c语言程序设计实习报告程序

1、#include stdio.h/* 定义学生结构体 */struct Studentchar ID20;char Name20;float Mark1; /* 计算机 */float Mark2; /* 英语 */float Mark3; /* 数学 */float Zongfen; /* 总分 */float Average; /* 平均分 */* 声明学生数组及学生数量 */struct Student students2000;int num=0;/* 求总分 */float Zong(struct Student stu)return(stu.Mark1+stu.Mark2+stu.

2、Mark3);/* 求平均值 */float Avg(struct Student stu)return (stu.Mark1+stu.Mark2+stu.Mark3)/3;/* 通过学号返回数组下标 */int Student_SearchByIndex(char id) int i;for (i=0;inum;i+)if (strcmp(studentsi.ID,id)=0)return i;return -1;/* 通过姓名返回数组下标 */int Student_SearchByName(char name)int i;for (i=0;inum;i+)if (strcmp(stude

3、ntsi.Name,name)=0)return i;return -1;/* 通过学号返回数组下标 */int Student_SearchID(char id)int i;for (i=0;inum;i+)if (strcmp(studentsi.ID,id)=0)return i;return -1;/* 显示单条学生记录 */void Student_DisplaySingle(int index)printf(%10s%10s%8s%8s%8s%8s%10sn, 学号,姓名,计算机 ,英语 ,数学,总分,平 均成绩 );printf(n);rintf(%10s%10s%8.0f%8.

4、0f%8.0f%8.0f%10.2fn,studentsindex.ID,studentsindex.Name, studentsindex.Mark1,studentsindex.Mark2,studentsindex.Mark3,studentsindex.Zongfen,stu dentsindex.Average);void Student_DisplaySingle1(int index)printf(n);rintf(%10s%10s%8.0f%8.0f%8.0f%8.0f%10.2fn,studentsindex.ID,studentsindex.Name, studentsin

5、dex.Mark1,studentsindex.Mark2,studentsindex.Mark3,studentsindex.Zongfen,stu dentsindex.Average);/* 插入学生信息 */void Student_Insert()while(1)printf( 请输入学号 :);scanf(%s,&studentsnum.ID);getchar();printf( 请输入姓名 :);scanf(%s,&studentsnum.Name);getchar();printf( 请输入计算机成绩 :);scanf(%f,&studentsnum.Mark1);getcha

6、r();printf( 请输入英语成绩 :);scanf(%f,&studentsnum.Mark2);getchar();printf( 请输入数学成绩 :);scanf(%f,&studentsnum.Mark3);getchar(); studentsnum.Average=Avg(studentsnum); studentsnum.Zongfen=Zong(studentsnum); num+;printf( 是否继续 ?(y/n);if (getchar()=n)break;void exit() ;/* 修改学生信息 */void Student_Modify()float mar

7、k1,mark2,mark3;while(1)char id20;int index;printf( 请输入要修改的学生的学号 :);scanf(%s,&id);getchar();index=Student_SearchByIndex(id);printf( 学生不存在 !n); else printf( 你要修改的学生信息为 :n);Student_DisplaySingle(index); printf(- 请输入新值 -n); printf( 请输入学号 :); scanf(%s,&studentsindex.ID); getchar(); printf( 请输入姓名 :); scan

8、f(%s,&studentsindex.Name); getchar(); printf( 请输入成绩 :); scanf(%f,&studentsindex.Mark1); getchar(); printf( 请输入成绩 :); scanf(%f,&studentsindex.Mark2); getchar(); printf( 请输入成绩 :); scanf(%f,&studentsindex.Mark3); getchar(); studentsindex.Zongfen=Zong(studentsindex); studentsindex.Average=Avg(studentsin

9、dex); printf( 是否继续 ?(y/n);if (getchar()=n)break;/* 删除学生信息 */void Student_Delete()int i;while(1)char id20; int index; printf( 请输入要删除的学生的学号 :); scanf(%s,&id);getchar(); index=Student_SearchByIndex(id);if (index=-1)printf( 学生不存在 !n);elseprintf( 你要删除的学生信息为 :n);Student_DisplaySingle(index);printf( 是否真的要删

10、除 ?(y/n); if (getchar()=y) for (i=index;inum-1;i+)studentsi=studentsi+1; num-;getchar();printf( 是否继续 ?(y/n);if (getchar()=n)break;/* 按姓名或学号查询 */void Student_Select()int sel;printf(1 按姓名查询 n);printf(2 按学号查询 n);scanf(%d,&sel);if(sel=2)while(1)char id20;int index;printf( 请输入要查询的学生的学号 :); scanf(%s,&id);

11、getchar();index=Student_SearchID(id);printf( 学生不存在 !n);elseprintf( 你要查询的学生信息为 :n);Student_DisplaySingle(index);printf( 是否继续 ?(y/n);if (getchar()=n)break;else if (sel=1)while(1)char name20;int index;printf( 请输入要查询的学生的姓名 :);scanf(%s,&name);getchar();index=Student_SearchByName(name);if (index=-1)printf

12、( 学生不存在 !n);elseprintf( 你要查询的学生信息为 :n);Student_DisplaySingle(index);printf( 是否继续 ?(y/n);if (getchar()=n)break;else printf( 信息错误 !n);/*排序 */void Student_SortByAverage()int a,sel;printf(1 按学号排序 n);printf(2 按姓名排序 n);printf(3 按计算机排序 n);printf(4 按英语排序 n);printf(5 按数学排序 n);printf(6 按总分排序 n);printf(7 按平均分排

13、序 n);scanf(%d,&sel);if(sel=1)int i,j;struct Student tmp;for (i=0;inum;i+)for (j=1;j0)tmp=studentsj-1; studentsj-1=studentsj; studentsj=tmp;else if(sel=2)int i,j;struct Student tmp;for (i=0;inum;i+)for (j=1;j0)tmp=studentsj-1; studentsj-1=studentsj; studentsj=tmp;else if(sel=3)int i,j;struct Student

14、tmp;for (i=0;inum;i+)for (j=1;jstudentsj.Mark1)tmp=studentsj-1;studentsj-1=studentsj; studentsj=tmp;else if(sel=4)int i,j;struct Student tmp;for (i=0;inum;i+)for (j=1;jstudentsj.Mark2)tmp=studentsj-1;studentsj-1=studentsj; studentsj=tmp;else if(sel=5)int i,j;struct Student tmp;for (i=0;inum;i+)for (

15、j=1;jstudentsj.Mark3)tmp=studentsj-1;studentsj-1=studentsj; studentsj=tmp;else if(sel=6)int i,j;struct Student tmp;for (i=0;inum;i+)for (j=1;jstudentsj.Zongfen) tmp=studentsj-1; studentsj-1=studentsj; studentsj=tmp;else if(sel=7)int i,j;struct Student tmp;for (i=0;inum;i+)for (j=1;jstudentsj.Average

16、)tmp=studentsj-1; studentsj-1=studentsj;studentsj=tmp;else printf( 信息错误 !n);/* 显示学生信息 */void Student_Display()int i;printf(%10s%10s%8s%8s%8s%8s%10sn, 学号,姓名,计算机 ,英语,数学,总分 , 平均成绩 ); printf(n);for (i=0;inum;i+) rintf(%10s%10s%8.0f%8.0f%8.0f%8.0f%10.2fn,studentsi.ID,studentsi.Name, studentsi.Mark1,stude

17、ntsi.Mark2,studentsi.Mark3,studentsi.Zongfen,studentsi.Average);/* 将学生信息从文件读出 */void IO_ReadInfo()FILE *fp; int i;if (fp=fopen(Database.txt,rb)=NULL)printf( 不能打开文件 !n);return;if (fread(&num,sizeof(int),1,fp)!=1)num=-1;elsefor(i=0;inum;i+)fread(&studentsi,sizeof(struct Student),1,fp);fclose(fp);/* 将学

18、生信息写入文件 */void IO_WriteInfo()FILE *fp;int i;if (fp=fopen(Database.txt,wb)=NULL)printf( 不能打开文件 !n);return;if (fwrite(&num,sizeof(int),1,fp)!=1)printf( 写入文件错误 !n);for (i=0;inum;i+)if (fwrite(&studentsi,sizeof(struct Student),1,fp)!=1) printf( 写入文件错误 !n);fclose(fp);/* 统计不同分数段的学生 */void Student_TJ()whil

19、e(1)int a,sel;float m,n;printf(1 按计算机统计不同分数段的学生n);printf(2 按英语统计不同分数段的学生n);printf(3 按数学统计不同分数段的学生n);printf(4 按总分统计不同分数段的学生n);printf(5 按平均分统计不同分数段的学生n);scanf(%d,&sel);printf( 输入所需查询的分数段 m,n); scanf(%f%f,&m,&n);printf(%10s%10s%8s%8s%8s%8s%10sn, 学号,姓名,计算机 ,英语,数学, 总 分, 平均成绩 );if(sel=1)int j;for (j=0;j=m

20、&studentsj.Mark1=n) Student_DisplaySingle1(j);else if(sel=2)int j;for (j=0;j=m&studentsj.Mark2=n) Student_DisplaySingle1(j);else if(sel=3)int j;for (j=0;j=m&studentsj.Mark3=n) Student_DisplaySingle1(j);else if(sel=4)int j;for (j=0;j=m&studentsj.Zongfen=n) Student_DisplaySingle1(j);else if(sel=5)int j;for (j=0;j=m&studentsj.Average=n)Student_DisplaySingle1(j);else printf( 信息错误 !n);printf(