C语言程序设计苏小红课后习题答案高等教育出版
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Last revision date: 13 December 2020.
2 2 #include
main()
{
float x=2.5,y=2.5,z=2.5;
printf("x=%f\n",x);
printf("y=%f\n",y);
printf("z=%f\n",z);
}
3.1(1)
#include
main()
{
int a=12,b=3;
float x=18.5,y=4.6;
}
3.1(2)
#include
main()
{
int x=32,y=81,p,q;
p=x++;
q=--y;
printf("%d %d\n",p,q);
printf("%d %d\n",x,y);
}
3.2
#include
main()
{
int x,b0,b1,b2,s;
printf("Inputx:");
scanf("%d",&x);
b2=x/100;
b1=(x-b2*100)/10;//或(x%100)/10;或x/10%10;
b0=x%10;
s=b0*100+b1*10+b2;
printf("s=%d\n",s);
}
3.3
#include
#include
main()
{
float rate=0.0225;
float n,capital,deposit;
printf("Input n,capital:");
scanf("%f,%f",&n,&capital);
deposit=capital*pow(1+rate,n);
printf("deposit=%f\n",deposit); }
3.4
#include
#include
main()
{
float a, b, c;
double x, y;
printf("Input a, b, c:");
scanf("%f %f %f", &a, &b, &c);
x=(-b+sqrt(b*b-4*a*c))/(2*a);
y=(-b-sqrt(b*b-4*a*c))/(2*a);
printf("x=%f,y=%f\n",x,y);
}
习题4
4.1(1)
#include
main()
{
}
4.1(2)
#include
main()
{
int a=12,b=15;
}
4.1(3)
#include
main()
{
int a,b;
printf("%d,%d\n",a,b);
}
4.2
#include
main()
{
long a,b;
float x,y;
scanf("%d,%d\n",&a,&b);
scanf("%f,%f\n",&x,&y);
printf("a=%d,b=%d\n",a,b);
printf("x=%f,b=%f\n",x,y);
}
5.1
#include
main()
{
float a;
printf("Input a:");
scanf("%f",&a);
if(a>=0)
{
a=a;
printf("a=%f\n",a);
}
else
{
a=-a;
printf("a=%f\n",a);
}
}
5.2
#include
main()
{
int a;
printf("Input a:");
scanf("%d", &a);
if(a%2==0)
{
printf("a 是偶数");
}
else
{
printf("a 是奇数");
}
}
5.3
#include
#include
main()
{
float a,b,c,s,area;
printf("Input a, b, c:");
scanf("%f %f %f", &a, &b, &c);
if(a+b>c&&a+c>b&&b+c>a)
{
s=(a+b+c)/2;
area=(float)sqrt(s*(s-a)*(s-b)*(s-c));
printf("area=%f\n",area);
