学生成绩管理系统v6.0word版本

1、 #include #include #include #define m_l 10#define m_num 30#define m_cs 6typedef struct studentlong num ;char namem_l;float scorem_cs;float sum;float aver;stu;int menu(void);void readscore(stu stu,int n,int m);void aversumofeverystudent(stu stu,int n,int m);void aversumofeverycourse(stu stu,int n,int

2、 m);void sortbyscore(stu stu,int n,int m,int (*compare)(float a,float b);int ascending(float a,float b);int descending(float a,float b);void swapfloat(float *x,float *y);void swaplong(long *x,long *y);void swapchar(char x,char y);void assortbynum(stu stu, int n, int m);void sortbyname(stu stu, int n

3、, int m);void searchbynum(stu stu, int n, int m);void searchbyname(stu stu, int n, int m);void statisticanlysis(stu stu, int n, int m);void printscore(stu stu, int n, int m);void writetofile(stu stu, int n, int m);void readfromfile(stu stu, int *n, int *m);int main()char ch;int n=0,m=0;stu stum_num;

4、printf(请输入学生人数(n=%d):n,m_num);scanf(%d,&n);printf(请输入课程数目(m=%d):n,m_cs);scanf(%d,&m);while(1)ch=menu(); switch(ch)case 1:readscore(stu,n,m);break;case 2:aversumofeverystudent(stu ,n,m);break;case 3:aversumofeverycourse(stu ,n,m);break;case 4:sortbyscore(stu ,n,m,descending);printf(n 成绩降序排序n);printsc

5、ore( stu ,n, m);break;case 5:sortbyscore(stu ,n,m,ascending);printf(n 成绩升序排序n);printscore( stu ,n, m);break;case 6:assortbynum( stu , n, m);printf(n 学号升序排序n);printscore( stu ,n, m);break;case 7:sortbyname( stu , n, m);printf(n 姓名字典升序排序n);printscore( stu ,n, m);break;case 8:searchbynum( stu , n, m);b

6、reak;case 9:searchbyname( stu , n, m);break;case 10:statisticanlysis( stu , n, m);break;case 11:printscore( stu ,n, m);break;case 12: writetofile(stu,n,m);break;case 13:readfromfile(stu,&n,&m);break;case 0:printf(n 欢迎下次继续使用);exit(0);default:printf(n 输入错误);return 0;int menu(void)int items;printf(欢迎使用

7、学生成绩管理系统n);printf(1.输入成绩n);printf(2.计算各个学生总成绩和平均成绩n);printf(3.计算各门学科总成绩和平均成绩n);printf(4.成绩降序排序n);printf(5.成绩升序排序n);printf(6.学号升序排序n);printf(7.姓名升序排序n);printf(8.通过学号查找成绩n);printf(9.通过姓名查找成绩n);printf(10.标准分析n);printf(11.显示成绩n);printf(12.写入文件n);printf(13.读取文件n);printf(0.退出n);printf(请做出您的选择n);scanf(%d,&

8、items);return items;void readscore(stu stu,int n,int m)int i,j;printf(请输入学生学号，姓名，成绩n);for(i=0;in;i+)scanf(%ld%s,&stui.num,); stui.sum=0;for(j=0;j0)stui.aver= m0 ? stui.sum/m : -1;void aversumofeverystudent(stu stu,int n,int m)int i,j;for(i=0;in;i+)printf(学生 %d：总成绩： %.1f，平均成绩： %.1fn,i+1,stui

9、.sum,stui.aver);void aversumofeverycourse(stu stu,int n,int m)int i,j;float summ_cs,averm_cs;for(i=0;im;i+)sumi=0;for(j=0;j0?sumi/n:-1;printf(课程 %d：总成绩： %.1f，平均成绩： %.1fn,i+1,sumi,averi);void sortbyscore(stu stu,int n,int m,int (*compare)(float a,float b)int i,j,k,t;for(i=0;in-1;i+)k=i;for(j=i+1;jn;j

10、+)if(*compare)(stuj.sum,stuk.sum)k=j; if(k!=i)for(t=0;tm;t+)swapfloat(&stuk.scoret,&stui.scoret);swapfloat(&stuk.sum,&stui.sum);swapfloat(&stuk.aver,&stui.aver);swaplong(&stuk.num,&stui.num);swapchar(,);int ascending(float a,float b)return ab;void swapfloat(float *x,float *y)float

11、b;b=*x;*x=*y;*y=b;void swaplong(long *x,long *y)long b;b=*x;*x=*y;*y=b;void swapchar(char x,char y)char bm_l;strcpy(b,x);strcpy(x,y);strcpy(y,b);void assortbynum(stu stu, int n, int m) int i,j,k,t;for(i=0;in-1;i+)k=i;for(j=i+1;jn;j+)if(stuj.numstuk.num)k=j;if(k!=i)for(t=0;tm;t+)swapfloat(&stuk.score

12、t,&stui.scoret);swapfloat(&stuk.sum,&stui.sum);swapfloat(&stuk.aver,&stui.aver);swaplong(&stuk.num,&stui.num);swapchar(,);void sortbyname(stu stu, int n, int m)int i,j,t;for(i=0;in-1;i+)for(j=i+1;jn;j+)if(strcmp(,)0)for(t=0;tm;t+)swapfloat(&stui.scoret,&stuj.score

13、t);swapfloat(&stuj.sum,&stui.sum);swapfloat(&stuj.aver,&stui.aver);swaplong(&stuj.num,&stui.num);swapchar(,);void searchbynum(stu stu, int n, int m) long num;int i,j;printf(输入你所想要查找的学号n);scanf(%ld,&num);for(i=0;in;i+)if(stui.num=num)printf(%ldt%st,stui.num,);for(j=0;jm;j+)

14、printf(%.0ft,stui.scorej);printf(%.0ft%.0fn,stui.sum,stui.aver);return;printf(n 查无此号 n);void searchbyname(stu stu, int n, int m)char namem_l;int i,j;printf(输入你所想要查找的姓名n);scanf(%s,name);for(i=0;in;i+)if(strcmp(,name)=0)printf(%ldt%st,stui.num,);for(j=0;jm;j+)printf(%.0ft,stui.scorej

15、);printf(%.0ft%.0fn,stui.sum,stui.aver);return;printf(n 查无此人 n);void statisticanlysis(stu stu, int n, int m)int i,j,total,t6; for(j=0;jm;j+)printf(学科：%d:n,j+1);memset(t,0,sizeof(t);for(i=0;i=0&stui.scorej60)t0+;else if(stui.scorej70)t1+;else if(stui.scorej80)t2+;else if(stui.scorej90)t3+;else if(stu

16、i.scorej100)t4+;else if(stui.scorej=100)t5+;total=0;for(i=0;i=5;i+)total+=ti;for(i=0;i=5;i+)if(i=0)printf(60t%dt%.2f%n,ti,(float)ti/n*100);else if(i=5)printf(=100t%dt%.2f%n,ti,(float)ti/n*100);elseprintf(%d-%dt%dt%.2f%n,ti,(i+5)*10,(i+5)*10+9,(float)ti/n*100);void printscore(stu stu, int n, int m)in

17、t i,j;for(i=0;in;i+)printf(%ldt%st,stui.num,);for(j=0;jm;j+)printf(%.1ft,stui.scorej); printf(%.1ft%.1fn,stui.sum,stui.aver);void writetofile(stu stu, int n, int m)file *fp;int i,j;if(fp=fopen(student.txt,w)=null)printf(打开 “student.txt”失败！n);exit(0);fprintf(fp,%dt%dn,n,m);for(i=0;in;i+)fprintf(fp,%10ld%10s,stui.num,);for(j=0;jm;j+)fprintf(fp,%12.0f,stui.scorej);fprintf(fp,%12.0f%12.0fn,stui.sum,stui.aver);fclose(fp);void readfromfile(stu stu,int *