软件工程数据流图F2学生信息 F0学生信息及P 存储 S0 成绩录入文件存储 D0 学生单科 F1学生单科成成绩管理教师 F3根据存储分绩输出及评估系统析输出图1 学生单科成绩管理顶层数据流图F2.0导入 P1 F0.0学生信学生信息息及成绩输D1 学生基本信息存储学生信息入 S0 F2.1输入及成绩输学生信息存储入管理 F2.2学生成绩存储教师 F1.0成绩信息反馈 P2 F3.0成绩数据 D2 成绩存储单科成绩输出及分析图2 学生单科成绩管理第一层数据流图development in order to protect a host of attractions and historical sites, as well as to maintain the economic vitality of the downtown area. Figure 5.1-5 figure 5.1.4 Washington mass transit network to support implementation of effective transport demand management policies to reduce urban traffic congestion and public transport priority was in the early 1960 of the 20th century by the planners first proposed in Paris, France, and in Europe and other major cities to operate has been the formation of the rich content system. Public transport priority consists of two aspects: one is on the bus to help. ... 5.1-7 Park and ride systems 5.1.5 typical case Hong Kong-Japan Sapporo, Sapporo is a JapanHokkaido central parts of cities, Japan's fifth largest city. Area of 1121km2 in the city, a population of 1.921 million. In addition is the administrative center of Hokkaido, Sapporo is Hokkaido's industrial and commercial center, in 1972, hosted the 11th Winter Olympic Games. 3 JR Sapporo rail transit line 3 metro and 3 tram lines, Sapporo in the urban development process combined with Center of construction of subway construction and residential development, and support the development of the region. Prior to 1971, Sapporo, Japan Hokkaido local Centre in the urban development process, in response to the rapid growth of the city centre traffic demand, building trams. 1981 years ago for holding the winter Olympic Games as an opportunity to start building connected to the venue and the city centreF2.0.0导入学生基P1.1 本信息D1 学生基本信息学生信息F2.1.0输 F0.0.0 存储录入学生基入学生本信息基本信息存储录入 F0.0.1学生F2.1.1学生信息成绩录入 P1.2 F2.2.0成绩存储成绩录入F0.0.2成绩百分比 S0 P1.3 F2.2.1汇总后F1.0.0成学生成绩成绩存储教师绩打汇总印F3.0.0获得文件P2.1中学生成绩成绩打印F1.0.1总成D2 学生成绩存储输出绩分析汇总 F3.0.1根据总成绩进P2.2行分析总成绩分析F1.0.2试卷F3.0.2试卷分析分析输出 P2.3试卷分析F1.0.3成绩转出P2.4 F3.0.3根据成绩存储转出成绩转出图3 学生单科成绩管理系统第二层数据流图development in order to protect a host of attractions and historical sites, as well as to maintain the economic vitality of the downtown area. Figure 5.1-5 figure 5.1.4 Washington mass transit network to support implementation of effective transport demand management policies to reduce urban traffic congestion and public transport priority was in the early 1960 of the 20th century by the planners first proposed in Paris, France, and in Europe and other major cities to operate has been the formation of the rich content system. Public transport priority consists of two aspects: one is on the bus to help. ... 5.1-7 Park and ride systems 5.1.5 typical case Hong Kong-Japan Sapporo, Sapporo is a Japan Hokkaido central parts of cities, Japan's fifth largest city. Area of 1121km2 in the city, a population of 1.921 million. In addition is the administrative center of Hokkaido, Sapporo is Hokkaido's industrial and commercial center, in 1972, hosted the 11th Winter Olympic Games. 3 JR Sapporo rail transit line 3 metro and 3 tram lines, Sapporo in the urban development process combined with Center of construction of subwayconstruction and residential development, and support the development of the region. Prior to 1971, Sapporo, Japan Hokkaido local Centre in the urban development process, in response to the rapid growth of the city centre traffic demand, building trams. 1981 years ago for holding the winter Olympic Games as an opportunity to start building connected tothe venue and the city centredevelopment in order to protect a host of attractions and historical sites, as well as to maintain the economic vitality of the downtown area. Figure 5.1-5 figure 5.1.4 Washington mass transit network to support implementation of effective transport demand management policies to reduce urban traffic congestion and public transport priority was in the early 1960 of the 20th century by the planners first proposed in Paris, France, and in Europe and other major cities to operate has been the formation of the rich content system. Public transport priority consists of two aspects: one is on the bus to help. ... 5.1-7 Park and ride systems 5.1.5 typical case Hong Kong-Japan Sapporo, Sapporo is a Japan Hokkaido central parts of cities, Japan's fifth largest city. Area of 1121km2 in the city, a population of 1.921 million. In addition is the administrative center of Hokkaido, Sapporo is Hokkaido's industrial and commercial center, in 1972, hosted the 11th Winter Olympic Games. 3 JR Sapporo rail transit line 3 metro and 3 tram lines, Sapporo in the urban development process combined with Center of construction of subway construction and residential development, and support the development of the region. Prior to 1971, Sapporo, Japan Hokkaido local Centre in theurban development process, in response to the rapid growth of the city centre traffic demand, building trams. 1981 years ago for holding the winter Olympic Games as an opportunity to start building connected tothe venue and the city centre数据结构编号:D1数据结构名称:学生基本信息存储别名:学生信息存储描述:简述学生的个人基本信息，包括学号，姓名数据结构编号:D2数据结构名称:学生成绩存储别名:学生成绩描述:简述学生的成绩，包括学生基本信息，学生平时成绩，期末成绩，总成绩和备注信息数据流编号:F2.1.0数据流名称:输入学生基本信息存储简述:学生基本信息输入数据流来源:教师数据流去向:学生基本信息存储文件数据组成: 学生姓名+学生学号数据项编号:I1数据项名称:学生学号别名:学生编号简述:定义唯一学生标识信息—学号类型及宽度:字符型，12位development in order to protect a host of attractions and historical sites, as well as to maintain the economic vitality of the downtown area. Figure 5.1-5 figure 5.1.4 Washington mass transit network to supportimplementation of effective transport demand management policies to reduce urban traffic congestion and public transport priority was in the early 1960 of the 20th century by the planners first proposed in Paris, France, and in Europe and other major cities to operate has been the formation of the rich content system. Public transport priority consists of two aspects: one is on the bus to help. ... 5.1-7 Park and ride systems 5.1.5 typical case Hong Kong-Japan Sapporo, Sapporo is a Japan Hokkaido central parts of cities, Japan's fifth largest city. Area of 1121km2 in the city, a population of 1.921 million. In addition is the administrative center of Hokkaido, Sapporo is Hokkaido's industrial and commercial center, in 1972, hosted the 11th Winter Olympic Games. 3 JR Sapporo rail transit line 3 metro and 3 tram lines, Sapporo in the urban development process combined with Center of construction of subway construction and residential development, and support the development of the region. Prior to 1971, Sapporo, Japan Hokkaido local Centre in the urban development process, in response to the rapid growth of the city centre traffic demand, building trams. 1981 years ago for holding the winter Olympic Games as an opportunity to start building connected to the venue and the city centre数据项编号:I2数据项名称:学生姓名别名:姓名简述:学生个人姓名信息类型及宽度:字符型，8位数据流编号:F2.2.0数据流名称:学生成绩存储简述:学生成绩数据流来源:教师数据流去向:学生成绩存储数据组成::平时成绩+期末成绩数据项编号:I3数据项名称:学生平时成绩别名:平时成绩简述:学生有一个平时成绩，可根据平时成绩所占百分比求总评成绩类型及宽度:浮点型，4位数据项编号:I4数据项名称:学生期末成绩别名:期末成绩简述:学生有一个期末成绩即试卷分，可根据期末成绩所占百分比求总评成绩类型及宽度:浮点型，4位development in order to protect a host of attractions and historical sites, as well as to maintain the economic vitality of the downtown area. Figure 5.1-5 figure 5.1.4 Washington mass transit network to support implementation of effective transport demand management policies to reduce urban traffic congestion and public transport priority was in the early 1960 of the 20th century by the planners first proposed in Paris, France, and in Europe and other major cities to operate has been the formation of the rich content system. Public transport priority consists of two aspects: one is on the bus to help. ... 5.1-7 Park and ride systems 5.1.5 typical case Hong Kong-Japan Sapporo, Sapporo is a JapanHokkaido central parts of cities, Japan's fifth largest city. Area of 1121km2 in the city, a population of 1.921 million. In addition is the administrative center of Hokkaido, Sapporo is Hokkaido's industrial and commercial center, in 1972, hosted the 11th Winter Olympic Games. 3 JR Sapporo rail transit line 3 metro and 3 tram lines, Sapporo in the urban development process combined with Center of construction of subway construction and residential development, and support the development of the region. Prior to 1971, Sapporo, Japan Hokkaido local Centre in the urban development process, in response to the rapid growth of the city centre traffic demand, building trams. 1981 years ago for holding the winter Olympic Games as an opportunity to start building connected to the venue and the city centre数据流编号:F2.2.1数据流名称:汇总后成绩存储简述:根据平时成绩和期末成绩以及百分比汇总数据流来源:教师数据流去向:学生成绩存储数据组成::平时成绩百分比+期末成绩百分比数据组成: 学号+姓名+平时成绩+期末成绩数据项编号:I5数据项名称:学生平时成绩百分比别名:平时成绩百分比简述:学生有一个平时成绩百分比，可根据百分比求总评成绩类型及宽度:浮点型，4位数据项编号:I6数据项名称:学生期末成绩百分比别名:期末成绩百分比简述:学生有一个期末成绩百分比，可根据百分比求总评成绩类型及宽度:浮点型，4位development in order to protect a host of attractions and historical sites, as well as to maintain the economic vitality of the downtown area. Figure 5.1-5 figure 5.1.4 Washington mass transit network to support implementation of effective transport demand management policies to reduce urban traffic congestion and public transport priority was in the early 1960 of the 20th century by the planners first proposed in Paris, France, and in Europe and other major cities to operate has been the formation of the rich content system. Public transport priority consists of two aspects: one is on the bus to help. ... 5.1-7 Park and ride systems 5.1.5 typical case Hong Kong-Japan Sapporo, Sapporo is a Japan Hokkaido central parts of cities, Japan's fifth largest city. Area of 1121km2 in the city, a population of 1.921 million. In addition is the administrative center of Hokkaido, Sapporo is Hokkaido's industrial and commercial center, in 1972, hosted the 11th Winter Olympic Games. 3 JR Sapporo rail transit line 3 metro and 3 tram lines, Sapporo in the urban development process combined with Center of construction of subway construction and residential development, and support the development of the region. Prior to 1971, Sapporo, Japan Hokkaido local Centre in the urban development process, in response to the rapid growth of the city centre traffic demand, building trams. 1981 years ago for holding thewinter Olympic Games as an opportunity to start building connected tothe venue and the city centre数据源点编号:s0数据源点名称:教师输出的数据流:F0.0.0 , F0.0.1 , F0.0.2数据终点编号:s0数据终点名称:教师输出的数据流:F1.0.0 , F1.0.1 , F1.0.2 ,F1.0.3 加工编号:p1.1加工名称:学生基本信息录入输入信息:学号，姓名输出信息:学号，姓名加工逻辑:根据学生的姓名，学号，保存起来加工编号:p1.3加工名称:学生成绩汇总输入信息:平时成绩，期末成绩，平时成绩所占百分比，期末成绩所占百分比输出信息:总评成绩加工逻辑:根据学生的平时成绩和期末成绩，及其百分比，求得最后的总评成绩development in order to protect a host of attractions and historical sites, as well as to maintain the economic vitality of the downtown area. Figure 5.1-5 figure 5.1.4 Washington mass transit network to support implementation of effective transport demand management policies to reduce urban traffic congestion and public transport priority was in the early 1960 of the 20th century by the planners first proposed in Paris, France, and in Europe and other major cities to operate has been theformation of the rich content system. Public transport priority consists of two aspects: one is on the bus to help. ... 5.1-7 Park and ride systems 5.1.5 typical case Hong Kong-Japan Sapporo, Sapporo is a Japan Hokkaido central parts of cities, Japan's fifth largest city. Area of 1121km2 in the city, a population of 1.921 million. In addition is the administrative center of Hokkaido, Sapporo is Hokkaido's industrial and commercial center, in 1972, hosted the 11th Winter Olympic Games. 3 JR Sapporo rail transit line 3 metro and 3 tram lines, Sapporo in the urban development process combined with Center of construction of subway construction and residential development, and support the development of the region. Prior to 1971, Sapporo, Japan Hokkaido local Centre in the urban development process, in response to the rapid growth of the city centre traffic demand, building trams. 1981 years ago for holding the winter Olympic Games as an opportunity to start building connected tothe venue and the city centre加工编号:p2.2加工名称:总成绩分析输入信息:学号，姓名，平时成绩，期末成绩，总评成绩，备注输出信息:考核人数，平均分数，最高分数，最低分数，优秀率，及格率，不及格率，标准差加工逻辑:根据学生成绩信息，查询班级的学生平均成绩，最高最低成绩，优秀率等development in order to protect a host of attractions and historical sites, as well as to maintain the economic vitality of the downtown area.Figure 5.1-5 figure 5.1.4 Washington mass transit network to support implementation of effective transport demand management policies to reduce urban traffic congestion and public transport priority was in the early 1960 of the 20th century by the planners first proposed in Paris, France, and in Europe and other major cities to operate has been the formation of the rich content system. Public transport priority consists of two aspects: one is on the bus to help. ... 5.1-7 Park and ride systems 5.1.5 typical case Hong Kong-Japan Sapporo, Sapporo is a Japan Hokkaido central parts of cities, Japan's fifth largest city. Area of 1121km2 in the city, a population of 1.921 million. In addition is the administrative center of Hokkaido, Sapporo is Hokkaido's industrial and commercial center, in 1972, hosted the 11th Winter Olympic Games. 3 JR Sapporo rail transit line 3 metro and 3 tram lines, Sapporo in the urban development process combined with Center of construction of subway construction and residential development, and support the development of the region. Prior to 1971, Sapporo, Japan Hokkaido local Centre in the urban development process, in response to the rapid growth of the city centre traffic demand, building trams. 1981 years ago for holding the winter Olympic Games as an opportunity to start building connected to the venue and the city centre。
