C 语言全部题目及答案Exercise1:Programming Environment and Basic Input/Output1. Write a program that prints “This is my first program!” on the screen.(a) Save this program onto your own disk with the name of e2-1a;(b) Run this program without opening Turbo C;(c) Modify this program to print “This is my second program!”, then save it ase2-1b. Please do not overwrite the first program.2. Write a program that prints the number 1 to 4 on the same line. Write the programusing the following methods:(a) Using four “printf” statemen ts.(b) Using one “printf” statement with no conversion specifier (i.e. no ‘%’).(c) Using one “printf” statement with four conversion specifiers3 ．(a) Write a program that calculates and displays the number of minutes in 15 days.(b) Write a program that calculates and displays how many hours 180 minutes equal to.(c) (Optional) How about 174 minutes?ANSWERS:#include<stdio.h>int main(){printf("1"); printf("2"); printf("3"); printf("4");return 0;}return 0; }#include<stdio.h>int main(){float days,minutes; days = 15; int main() {printf("This program!");return 0;int main(){float minutes,hours;printf("The numberminutes in 15 are %f\n", minutes);printf("This program!"); int main() {return 0; }#include<stdio.h> #include<stdio.h> #include<stdio.h>of days firstmyisExercise 2: Data Types and Arithmetic Operations1. You purchase a laptop computer for $889. The sales tax rate is 6 percent. Write and execute a C program that calculates and displays the total purchase price (net price + sales tax).2 ．Write a program that reads in the radius of a circle and prints the circle’s diameter, circumference and area. Use the value 3.14159 for “ ”.3 ．Write a program that reads in two numbers: an account balance and an annual interest rate expressed as a percentage. Your program should then display the new balance after a year. There are no deposits or withdraws – just the interest payment. Your program should be able to reproduce the following sample run:Interest calculation program. Starting balance? 6000Annual interest rate percentage? 4.25}#include<stdio.h>int main() {printf("%d%d%d%d",1,2,3,4);return 0; }hours = minutes / 60; printf("180 minutes equal to %f hours\n", hours);return 0; }#include<stdio.h>int main() {float minutes,hours;#include<stdio.h>int main(){float net_price,sales_tax,total;net_price = 889;sales_tax = net_price * 0.06;total = net_price + sales_tax;printf("The total purchase price is %g", total);return 0;}#include<stdio.h>int main(){printf("Please input a number as radius:\n");float radius,diameter,circumference,area;scanf("%f",&radius);printf("The diameter is %g\n",diameter = radius * 2);printf("The circumference is %g\n",circumference = radius * 2 * 3.14159); printf("The area is %g\n", area = radius * radius * 3.14159);return 0;}#include<stdio.h>{float SB,percentage,NB;printf("Interest calculation program\n\nPlease enter the Starting Balance:"); scanf("%f",&SB);printf("Please enter the Annual interest rate percentage:");scanf("%f",&percentage);NB = SB * percentage / 100 + SB;printf("\nThe Balance after one year is:%g",NB);return 0;}Exercise 3: Selection structure1 ． Write a C program that accepts a student’s numerical grade, converts thenumerical grade to Passed (grade is between 60-100), Failed (grade is between 0-59), or Error (grade is less than 0 or greater than 100). 2 ． Write a program that asks the user to enter an integer number, then tells theuser whether it is an odd or even number. 3 ． Write a program that reads in three integers and then determines and prints thelargest in the group.ANSWER: #include<stdio.h>#include<stdio.h>int main() {#include<stdio.h>int main() {int grade;printf("Please enter the grade:");scanf("%d",&grade);if (grade >= 60 && grade <= 100) printf("Passed."); else if (grade >= 0 && grade <60)#include<stdio.h>int main() {int a,b,c;printf("Please enter 3 integer numbers\n"); printf("Then I'll tell you which is thelargest\n"); scanf("%d%d%d",&a,&b,&c); if (a > b && a > c) printf("%d is the largest",a);else if (b > a && b > c) printf("%d is the largest",b); else if (c > a && c > b)int a;printf("Please enter an integer number\n");printf("Then I'll tell you whether it's an odd or even number");scanf("%d",&a);if (a%2 == 0)printf("%d is an even number",a);elseprintf("%d is a odd number",a);return 0;}Exercise 4: ‘switch’statement and simple “while” repetition statement1. Write a program that reads three integers an abbreviated date (for example: 26 12 94) andthat will print the date in full; for example: 26th December 1994. The day should be followed by an appropriate suffix, ‘st’,‘nd’,‘rd’ or ‘th’. Use at least one switch statement.2 ．Write a C program that uses a while loop to calculate and print the sum of the even integersfrom 2 to 30.3. A large chemical company pays its sales staff on a commission basis. They receive £ 200 perweek plus 9% of their gross sales for that week. For example, someone who sells £ 5000 of chemicals in one week will earn £ 200 plus 9% of £5000, a total of £650. Develop a C program that will input each salesperson’s sales for the previous week, and print out their salary.Process one person’s figures at a time.Enter sales in pounds(-1to end):5000.00Salary is:650.00Enter sales in pounds(-1to end):00.00Salary is:200.00Enter sales in pounds(-1to end):1088.89Salary is:298.00Enter sales in pounds(-1to end):-1Optional：4. A mail order company sells five different products whose retail prices are shown in thefollowing table:Product Number1 2Retail Price (in pounds)2.984.503 4 59.98 4.49 6.87Write a C program that reads in a series of pairs of numbers as follows:(1). Product number(2). Quantity sold for one dayYour program should use a switch statement to help determine the retail price for each product, and should use a sentinel-controlled loop to calculate the total retail value of all products sold in a given week (7days).ANSWER:#include<stdio.h>int main(){printf("Please enter three numbers for date:");int day,month,year;scanf("%d %d %d",&day,&month,&year);if(day>31)printf("Error");else{switch (day){case 1:printf("1st");break;case 2:printf("2nd");break;case 3:printf("3rd");break;case 21:printf("21st"); break;case 22:printf("22nd"); break;case 23:printf("23rd"); break;case 31:printf("31st"); break;default:printf("%dth",day); }}switch(month){#include <stdio.h>int main(){int a,b;a=0;b=2;while (b<=30){a=a+b;b=b+2;}printf("The sum of the even integers from 2 to 30 is %d",a);return 0;}Exercise 5: ‘for’ and ‘do … while ” repetition statements1. Write a program which uses a do/while loop to print out the first 10 powers of 2 other than 0 (ie. it prints out the values of 21, 22, ..., 210). Use a for loop to do the same.2. The constant can be calculated by the infinite series:= 4 - 4/3 + 4/5 - 4/7 + 4/9 - 4/11 +....case 1: printf("January ");break;case 2: printf("February ");break;case 3: printf("March ");break;case 4: printf("April ");break;case 5: printf("May ");break;case 6: printf("June ");break;case 7: printf("July ");break;case 8: printf("August ");break;case 9: printf("September ");break;#include<stdio.h> int main() { float a,b;while (a>0 ) {printf("Enter sales in pounds (-1 to end):");scanf("%f",&a); b=200+a*0.09; if (a==-1) printf(" ");else printf("Salary is %.0f\n",b); }return 0;Write a C program that uses a do/while loop to calculate using the series. The program should ask the user how many terms in the series should be used. Thus ifthe user enters ‘3’, then the program should calcula te as being 4 - 4/3 + 4/5.Nested repetition3. Write a program that prints the following diamond shape. You may use printf statements that print either a single asterisk (*) or a single blank. Maximize your use of repetition (with nested for statements) and minimize the number of printf statements.*****************************************4. Write a program to print a table as follows:1*1= 1 2*1= 2 3*1= 3 ….9*1= 9ANSWER:#include<stdio.h> int main(){int a,b;a=0;b=1;do{a++;9*4=36 9*5=459*6=54#include <stdio.h>int main(){double c,pie,p;int a,b,d,n;printf("Enterterms:");scanf("%d",&a);printf("Pie=");9*7=63 9*8=729*9=81#include <stdio.h>int main(){int row,a,b,j;row=1;j=4;while(row<=5){for(a=j;a>=1;a=a-1) printf(" ");2*2= 43*2= 69*3=27 9*2=183*3= 9#include <stdio.h>int main () { int i, j;for (i=1; i<=9; i++) {for (j=1; j<=9; j++) if (i>=j)printf("%1d*%1d=%2d ", i, j, i*j); printf("\n"); }getchar(); return 0;int main() { int a;for(a=2;a<=1024;a=a *2) printf("%d",a); return 0; }p=p+pie;if(n>1&&n<=a) {if(n%2!=0) printf("+"); else printf("-"); }printf("4/%d",d); n++; }printf("\n=%f",p); return 0; }}row=1; j=1;while(row<=5){ for(a=1;a<=j;a=a +1) printf(" "); for(b=1;b<=9-2*j;b++) printf("*"); for(a=1;a<=j;a=a +1) printf(" "); printf("\n"); row++;Exercise 6: Simple Functions1. Write a C program that reads several numbers and uses the functionround_to_nearest to round each of these numbers to the nearest integer.Theprogram should print both the original number and the rounded number.2. Write a program that reads three pairs of numbers and adds the larger of the firstpair,the larger of the second pair and the larger of the third e a function to return the larger of each pair.3.A car park charges a£2.00minimum fee to park for up to3hours,and anadditional£0.50for each hour or part hour in excess of three hours.The maximum charge for any given24-hour period is£10.00.Assume that no car parks for more than24hours at a time.Write a C program that will calculate and print the parking charges for each of3 customers who parked their car in the car park yesterday.The program should accept as input the number of hours that each customer has parked,and output the results in a neat tabular form,along with the total receipts from the three customers:Charge2.002.50 10.0014.50The program should use the function calculate_charges to determine the charge for each customer.ANSWER: #include<stdio.h> int main() {float larger_Number(float,float); float num1,num2,total=0;int a=0;while (a<3) { void round_to_nearest(float); float num; while (5){ total=total+larger_Number(num1,num2);a=a+1; }#include<stdio.h> #include<math.h> int main() {printf("Please input a number:"); scanf("%f",&num);TOTAL Hours 29.524.0 Car 4.0 1.5 2 3 1#include <stdio.h> int main() {float calculate_charges(float);float hour1,hour2,hour3,charge1,charge2,charge3,total1=0,total2=0;printf("Please input three car's parking hours:"); scanf("%f%f%f",&hour1,&hour2,&hour3);charge1=calculate_charges(hour1); charge2=calculate_charges(hour2); charge3=calculate_charges(hour3);printf("Car Hours Charge\n"); printf("1%10.1f%10.2f\n",hour1,charge1); printf("2%10.1f%10.2f\n",hour2,charge2);void round_to_nearest(float num1) {int near_integer; intsmall_integer=floor(num1);if (num1-small_integer>=0.5) near_integer=ceil(num1); elsenear_integer=floor(num1);printf("\nThe nearest integer of the number is:%d\n",near_integer); }printf("\nThe total is %f",total);return 0; }float larger_Number(float num1,float num2) { float larger;if (num1>=num2) {printf("%f",num1); larger=num1; } else {printf("3%10.1f%10.2f\n",hour3,charge3);total1=hour1+hour2+hour3;total2=charge1+charge2+charge3;printf("TOTAL%7.2f%9.2f",total1,total2);return 0;}float calculate_charges(float hour){float charge;if (hour<=3)charge=2;if (hour>3 && hour<=19)charge=2.+0.50*(hour-3.);if (hour>19 && hour<=24)charge=10;return(charge);}Exercise 7: More Functions1.Write a program that uses sentinel-controlled repetition to take an integer as input,and passes it to a function even which uses the modulus operator to determine if the integer is even. The function even should return 1 if the integer is even, and0 if it is not.base exponentThe program should take the value returned by the function even and use it to print out a message announcing whether or not the integer was even.2.Write a C program that uses the function integerPower1(base,exponent)to return the value of:base exponentso that, for example, integerPower1(3, 4) gives the value 3 * 3 * 3 * 3.Assume that exponent is a positive, non-zero integer, and base is an integer.The function should use a for loop, and make no calls to any math library functions.3. Write a C program that uses the recursive function integerPower2(base,exponent) to return the value of:base exponentso that, for example, integerPower2(3, 4) gives the value 3 * 3 * 3 * 3. Assume that exponent is a positive, non-zero integer, and base is an integer.The function should make no calls to any math library functions.(Hint:the recursive step will use the relationship:base exponent=base.base exponent-1and the base case will be when exponent is1since:base1=base.)ANSWER:#include<stdio.h>int main(){int a,b;int judge(int);void judge1(int);printf("Please enter a number");scanf("%d",&a);while(a>=-1){b=judge(a);judge1(b);printf("Please evter a number");scanf("%d",&a);}return 0;}int judge(int x){if (x%2!=0)return (0);elsereturn (1);}void judge1(int x){if (x==1)printf("It's even\n"); elseprintf("It's odd\n");#include<stdio.h>int main(){int integerPower2(int,int);int base,exponent,result;printf("This program cancalculate the power\n");printf("Enter a integer basenumber:\n");scanf("%d",&base);printf("Enter a non-zerointeger number as the exponent:\n");scanf("%d",&exponent);result=integerPower2(base,expo nent);printf("The power is:%d",result); return 0;}int integerPower2(int x,int y){if(y==1)return (x);elsereturn (x*integerPower2(x,y-1)); }#include <stdio.h>int main(){int integerPower1(int,int);int base,exponent,answer;printf("Let us calculate the power\n");} printf("Please enter a integer base number:\n");scanf("%d",&base);printf("Please enter a non-zero integer number asthe exponent:\n");scanf("%d",&exponent);answer=integerPower1(base,exponent);printf("So the power is:%d",answer);return 0;}int integerPower1(int x,int y){int i,a;Exercise 08: Arrays1.Write a program that reads ten numbers supplied by the user into a singlesubscripted array,and then prints out the average of them.2. Write a program that reads ten numbers supplied by the user into a 2 by 5 array,and then prints out the maximum and minimum values held in:(a)each row(2rows)(b) the whole array3 ．Use a single-subscripted array to solve the following problem. Read in 20numbers,each of which is between10and100,inclusive.As each number is read, print it only if it is not a duplicate of a number already read.Prepare for the “worst case”in which all 20 numbers are different. Use the smallest possible array to solve this problem.#include<stdio.h>int main(){#define MAXGRADES 10 int grades[MAXGRADES]; int i, total = 0;#include<stdio.h>int main(){#define MAXNUM 5int number[MAXNUM]; int i,j,a;ANSWER: #include<stdio.h> int main() {#define NUMROWS 2 #define NUMCOLS 5int number[NUMROWS][NUMCOLS]; int i,j,max1,max2,min1,min2;for (i=0;i<NUMROWS;i++){ printf("Please input 5 numbers with space between each other:\n"); for (j=0;j<NUMCOLS;j++) scanf("%d",&number[i][j]); }max1=number[0][0]; min1=number[0][0]; max2=number[1][0];{ printf("Enter a number:"); scanf("%d",&grades[i]); }printf("\nThe average of the numbers\n"); for(i=0;i<MAXGRADES;i++) { printf("%d",grades[i]); total+=grades[i]; }average = total/10.0;for(i=0;i<MAXNUM;i++) scanf("%d",&number[i]);a=0;for(i=0;i<MAXNUM;i++) { for(j=0;j<i;j++) {if(number[i]==number[j])a++;}min2=number[1][0];for(j=0;j<NUMCOLS;j++) { if(number[0][j]>=max1) max1=number[0][j];if(number[0][j]<=min1)min1=number[0][j];if(number[1][j]>=max2)max2=number[1][j];if(number[1][j]<=min2)min2=number[1][j];}printf("The max of the first row is %d\n",max1);printf("The min of the first row is %d\n",min1);printf("The max of the second row is %d\n",max2);printf("The min of the second row is %d\n",min2);printf("The max of two rows is ");if (max1>=max2)printf("%d\n",max1);else printf("%d\n",max2);printf("The min of two rows is ");if (min1<=min2)printf("%d\n",min1);else printf("%d\n",min2);return 0;}Exercise 9: More Arrays1. Write a program that enters 5 names of towns and their respective distance (aninteger) from London in miles. The program will print of the names of the towns that are less than 100 miles from London. Use arrays and character strings to implement your program.2. Write a program that prompts the user to type in four character strings, placesthese in an array of strings, and then prints out: (e.g. I am Peter Pan)(i) The four strings in reverse order. (e.g. Pan Peter am I)(ii) The four strings in the original order, but with each string backwards. (e.g. I ma reteP naP)(iii) The four strings in reverse order with each string backwards. (e.g. naP reteP ma I)#include<stdio.h>int main(){char character[5][20];int integer[5];int i;for(i=0;i<5;i++){ printf("Please enter a name of a town:\n");scanf("%s",character[i]);printf("Enter its distance from London in miles:\n");scanf("%d",&integer[i]);}printf("The towns that are less than 100 miles from London are:\n"); for(i=0;i<5;i++){if(integer[i]<100)printf("%s",character[i]);}return 0;}Exercise 10: Pointers1. Write a program that reads 5 integers into an array, and then uses four differentmethods of accessing the members of an array to print them out in reverse order.//Pan Peter am I #include<stdio.h> int main() {char four[4][81]; int i;printf("Please input four words:\n");for(i=0;i<4;i++) scanf("%s",four[i]);printf("The four strings in reverse order is :\n"); for(i=3;i>=0;i--) { printf("%s",four[i]);//naP reteP ma I #include <stdio.h> int main() {char four[4][81]; int i,j;printf("Please input four words:\n"); for(i=0;i<4;i++)scanf("%s",four[i]); printf("The four strings are:\n"); for(i=3;i>=0;i--) {for(j=0;four[i][j]!='\0';j++); for(j=j-1;j>=0;j--) {2. Write a program that reads 8 floats into an array and then prints out the second,fourth, sixth and eighth members of the array, and the sum of the first, third, fifth and seventh, using pointers to access the members of the array.3. (Optional) Write a program that use a SINGLE FUNCTION （用一个函数）tofind and return simultaneously both the lowest and highest values in an array of type int. Suppose the size of the array is 6.ANSWER:#include<stdio.h>int main(){int num1[5],i;printf("Please input 5 numbers:\n");for (i=0;i<5;i++)scanf("%d",&num1[i]);//the first wayprintf("\nPrint them out in reverse order in the first way:\n");for (i=4;i>=0;i--)printf("%d",num1[i]);//the second wayprintf("\nPrint them out in reverse order in the second way:\n");int *num2;num2 = &num1[0];for (i=4;i>=0;i--)printf("%d",*(num2+i));//the third wayprintf("\nPrint them out in reverse order in the third way:\n");for(i=4;i>=0;i--)printf("%d",*(num1+i));//the fourth wayprintf("\nPrint them out in reverse order in the fourth way:\n");int *num4;num4 = &num1[4];for (i=0;i<5;i++)printf("%d",*(num4-i));return 0;}#include<stdio.h>int main(){float num[8];int i;printf("Please input 8 floats:\n");for (i=0;i<8;i++)scanf("%f",&num[i]);//first, print out the second,fourth,sixth and eighthmembers of the arrayfor (i=1;i<8;i=i+2)printf("%f",*(num+i));//second, print out the sum of thefirst,third,fifthand seventhfloat total;for (i=0;i<8;i=i+2)total = total+*(num+i); #include<stdio.h>void SingleFunction(int *,int *); int main(){int num[6];int i;printf("Please input 6numbers:\n"); for (i=0;i<6;i++)scanf("%d",&num[i]);SingleFunction(num,num); return 0;}void SingleFunction(int *max,int *min) {int i,maxnum,minnum; maxnum = *max++;minnum = *min++;for(i=-1;i<5;i++)。
