c语言大作业——学生成绩管理系统v5.0

//成绩管理系统v1.0#include <stdio.h>#include <stdlib.h>#include <string.h>#define N 30#define M 6typedef struct student{long studentID;char studentName[10];int score[M];}STU;void Input (STU stu[],int n,int m);void Totalave (STU stu[],int n,int m);void evestuTotalave (STU stu[],int n,int m);void Scoredes (STU stu[],int n,int m);void Scoreas (STU stu[],int n,int m);void Numas (STU stu[],int n,int m);void Dicas (STU stu[],int n,int m);void Searchbynum (STU stu[],int n,int x,int m);void Searchbymane(STU stu[],int n,char name[],int m); void statistis (STU stu[],int n,int m);void List (STU stu[],int n,int m);int main(){int n,c,x,m;char name[10];STU stu[N];printf("输入学生人数");scanf("%d",&n);printf("输入考试科目");scanf("%d",&m);printf("1.Input record\n");printf("2.Caculate totel and average score of every course\n");printf("3.Caculate totel and average score of every student\n");printf("4.Sort in descending order by total score of every student\n");printf("5.Sort in ascending order by total score of every student\n");printf("6.Sort in ascending order by number\n");printf("7.Sort in ascending order by name");printf("8.Search by number\n");printf("9.Search by name\n");printf("10.Statistic analysis for every course\n");printf("11.List record\n");printf("0.Exit\n");printf("Please enter your choice:\n");printf("\n");for(;;){scanf("%d",&c);switch(c){case 1: //录入学生学号和各科成绩Input (stu,n,m);printf("Please enter your choice:\n");break;case 2: //计算每门课程的总分和平均分Totalave (stu,n,m);printf("Please enter your choice:\n");break;case 3: //计算每个学生的总分和平均分evestuTotalave (stu,n,m);break;case 4: //按每个学生的总分由高到低排出名次表Scoredes (stu,n,m);printf("Please enter your choice:\n");break;case 5: //按每个学生的总分由低到高排出名次表Scoreas (stu,n,m);printf("Please enter your choice:\n");break;case 6: //按学号由小到大排出名次表Numas (stu,n,m);printf("Please enter your choice:\n");break;case 7: //按姓名的字典顺序排出成绩表Dicas(stu,n,m);printf("Please enter your choice:\n");break;case 8: //按学号查询学生排名及其各科成绩printf("请输入查找学号\n");scanf("%d",&x);Searchbynum(stu,n,x,m);printf("Please enter your choice:\n");break;case 9: //按姓名查询学生排名及其各科成绩printf("请输入查找姓名\n");scanf("%s",name);getchar();Searchbymane(stu,n,name,m);printf("Please enter your choice:\n");break;case 10: //成绩分析所占百分比statistis (stu,n,m);printf("Please enter your choice:\n");break;case 11: //全部输出List (stu,n,m);Totalave (stu,n,m);printf("Please enter your choice:\n");break;case 0:exit(0);}}return 0;}void Input (STU stu[],int n,int m) //1{int i,j;for(i=0;i<n;i++){printf("Input student's ID ,name and score");scanf("%ld",&stu[i].studentID);scanf("%s",stu[i].studentName);for(j=0;j<m;j++)scanf("%d",&stu[i].score[j]);}}void Totalave (STU stu[],int n,int m) //2.计算每门课程的总分和平均分{int i,j,sum[M];double ave[M];for(j=0;j<m;j++){sum[j]=0;for(i=0;i<n;i++){sum[j]=sum[j]+stu[i].score[j];}ave[j]=(double)sum[j]/n;}for(i=0;i<m;i++)printf("科目%d的总分=%d,课程的平均分=%f\n",i+1,sum[i],ave[i]);}void evestuTotalave (STU stu[],int n,int m) //3.计算每个学生的总分和平均分{int i,j,sum[N];double ave[N];for(i=0;i<n;i++){sum[i]=0;for(j=0;j<m;j++){sum[i]=sum[i]+stu[i].score[j];}ave[i]=(double)sum[i]/m;}for(i=0;i<n;i++)printf("学号为%ld,姓名为%s的总分=%d,其平均分=%f\n",stu[i].studentID,stu[i].studentName,sum[i],ave[i]);}void Scoredes (STU stu[],int n,int m) //4.按每个学生的总分由高到低排出名次表{int i,j,k,h,sum[N];for(i=0;i<n;i++){sum[i]=0;for(j=0;j<m;j++){sum[i]=sum[i]+stu[i].score[j];}}for(i=0;i<n;i++){k=i;for(j=i+1;j<n;j++){if (sum[j]>sum[k])k=j;}if(i!=k){t=stu[i],h=sum[i];stu[i]=stu[k],sum[i]=sum[k];stu[k]=t,sum[k]=h;}for(i=0;i<n;i++)printf("ID:%10ld,name:%s,score:%d\n",stu[i].studentID,stu[i].studentName,sum[i]);//以长整形打印用%ld}void Scoreas (STU stu[],int n,int m) //5.按每个学生的总分由di到gao排出名次表{int i,j,k,h,sum[N];STU t;for(i=0;i<n;i++){sum[i]=0;for(j=0;j<m;j++){sum[i]=sum[i]+stu[i].score[j];}}for(i=0;i<n;i++){for(j=i+1;j<n;j++){if (sum[j]<sum[k])k=j;}if(i!=k){t=stu[i],h=sum[i];stu[i]=stu[k],sum[i]=sum[k];stu[k]=t,sum[k]=h;}}for(i=0;i<n;i++)printf("ID:%10ld,name:%s,score:%d\n",stu[i].studentID,stu[i].studentName,sum[i]);//以长整形打印用%ld}void Numas (STU stu[],int n,int m) //6.按学号由小到大排出名次表{int i,j,k;STU t;for(i=0;i<n;i++){k=i;for(j=i+1;j<n;j++){if (stu[j].studentID<stu[k].studentID)k=j;}if(i!=k)t=stu[k],stu[k]=stu[i],stu[i]=t;}for(i=0;i<n;i++){printf("ID:%10ld,name:%s\n",stu[i].studentID,stu[i].studentName);//以长整形打印用%ldfor(j=0;j<m;j++)printf("project %d score:%d\n",j+1,stu[i].score[j]);}}void Dicas (STU stu[],int n,int m) //7.{int i,j;STU t;for(i=0;i<n;i++){for(j=i+1;j<n;j++){if(strcmp(stu[i].studentName,stu[j].studentName)>0)t=stu[i],stu[i]=stu[j],stu[j]=t;}}for(i=0;i<n;i++){printf("ID:%10ld,name:%s\n",stu[i].studentID,stu[i].studentName);for(j=0;j<m;j++)printf("project:%d,score:%d\n",j+1,stu[i].score[j]);}}void Searchbynum (STU stu[],int n,int x,int m) //8.按学号查询学生排名及其各科成绩{int i,j,c=1,find=0,sum[N];for(i=0;i<n;i++){sum[i]=0;for(j=0;j<m;j++)sum[i]=sum[i]+stu[i].score[j];}for(i=0;i<n;i++){if(stu[i].studentID==x){find=1;break;}}if(find==0)printf("not find\n");else{for(j=0;j<n;j++){if(sum[j]>sum[i])c++;}printf("ID:%10ld name:%s\n",stu[i].studentID,stu[i].studentName);//以长整形打印用%ld for(j=0;j<m;j++)printf("project %d score:%d\n",j+1,stu[i].score[j]);printf("all score: %d,order:%d\n",sum[i],c);}}void Searchbymane(STU stu[],int n,char name[],int m) //9 {int i,j,c=1,find=0,sum[N];for(i=0;i<n;i++){sum[i]=0;for(j=0;j<m;j++)sum[i]=sum[i]+stu[i].score[j];}for(i=0;i<n;i++){if(strcmp(stu[i].studentName,name)==0){find=1;break;}}if(find==0)printf("not find\n");else{for(j=0;j<n;j++){if(sum[j]>sum[i])c++;}printf("ID:%10ld,name:%s\n",stu[i].studentID,stu[i].studentName);//以长整形打印用%ld for(j=0;j<m;j++)printf("project %d score:%d\n",j+1,stu[i].score[j]);printf("all score: %d,order:%d\n",sum[i],c);}}void statistis (STU stu[],int n,int m) //10.{int a=0,b=0,c=0,d=0,e=0,i,j;double A,B,C,D,E;for(j=0;j<m;j++){for(i=0;i<n;i++){if(stu[i].score[j]>=90)a++;else if(stu[i].score[j]>=80)b++;else if(stu[i].score[j]>=70)c++;else if(stu[i].score[j]>=60)d++;elsee++;}A=(double)a/n*100;B=(double)b/n*100;C=(double)c/n*100;D=(double)d/n*100;E=(double)e/n*100;printf("project %d\n",j+1);printf("优秀人数%d,百分比:%f%%\n",a,A);printf("良好人数%d,百分比:%f%%\n",b,B);printf("中等人数%d,百分比:%f%%\n",c,C);printf("及格人数%d,百分比:%f%%\n",d,D);printf("不及格人数%d,百分比:%f%%\n",e,E);}}void List (STU stu[],int n,int m) //11.{int i,j,sum[N];double ave[N];for(i=0;i<n;i++){sum[i]=0;for(j=0;j<m;j++){sum[i]=sum[i]+stu[i].score[j];}ave[i]=(double)sum[i]/m;}for(i=0;i<n;i++){printf("ID:%10ld,name:%s\n",stu[i].studentID,stu[i].studentName);for(j=0;j<m;j++){printf("score:%d\n",stu[i].score[j]);}printf("总分=%d\n平均分%f\n",sum[i],ave[i]);}}Welcome To Download !!!欢迎您的下载，资料仅供参考！。