简单学生成绩管理系统

#include <stdio.h>
#include <stdlib.h>
#include<string.h>
#define n 100//此处自己更改
void face(void);
void choice(int m,char name[][20],double math[],double english[],double Clanguage[]);
void input(char name[][20],double math[],double english[],double Clanguage[]);
void ouput(char name[][20],double math[],double english[],double Clanguage[]);
void sort_ouput(char name[][20],double math[],double english[],double Clanguage[]);
void find_my(char name[][20],double math[],double english[],double Clanguage[]);
void jige(char name[][20],double math[],double english[],double Clanguage[]);
void averange(char name[][20],double math[],double english[],double Clanguage[]);

int main()
{
    char name[n][20];
    double math[n],english[n],Clanguage[n];
    face();
    int m;
    while(1){
        scanf("%d",&m);
        if(m==0)
            break;
        else
            choice(m,name,math,english,Clanguage);
    }
    return 0;
}

void face()
{
    printf("欢迎光临学生成绩管理系统，很高兴能为你服务\n");
    puts("*************************************************");
    puts("The menu is as follows:");
    puts("学生姓名与各科成绩的输入，请输入1来获得帮助");
    puts("学生姓名与各科成绩的输出，请输入2来获得帮助");
    puts("按学生总成绩从低到高排序并输出，请输入3来获得帮助");
    puts("按学生姓名来查找学生成绩，请输入4来获得帮助");
    puts("输出及格的学生姓名和成绩，请输入5来获得帮助");
    puts("计算学生平均成绩并且输出，请输入6来获得帮助");
    printf("说明：成绩以百分制，及格分数为\n每科分数都达到六十分来计算\n");
    printf("输入输出格式为：Name Math English Clanguage\n");
    puts("请输入0来关闭学生成绩管理系统 $*(0@0)*$ thank you");
}

void choice(int m,char name[][20],double math[],double english[],double Clanguage[])
{
    switch(m)
    {
        case 1:input(name,math,english,Clanguage);break;
        case 2:ouput(name,math,english,Clanguage);break;
        case 3:sort_ouput(name,math,english,Clanguage);break;
        case 4:find_my(name,math,english,Clanguage);break;
        case 5:jige(name,math,english,Clanguage);break;
        case 6:averange(name,math,english,Clanguage);break;
    }
}

void input(char name[n][20],double math[],double english[],double Clanguage[])
{
    int i;
    for(i=0;i<n;i++){
        scanf("%s %lf %lf %lf",&name[i],&math[i],&english[i],&Clanguage[i]);
    }
}

void ouput(char name[n][20],double math[],double english[],double Clanguage[])
{
    int i;
    printf("学生成绩如下：\n");
    for(i=0;i<n;i++){
        printf("%s %.2lf %.2lf %.2lf\n",name[i],math[i],english[i],Clanguage[i]);
    }
}

void sort_ouput(char name[n][20],double math[],double english[],double Clanguage[])
{
    double max[n];
    int i;
    printf("学生成绩排名如下：\n");
    for(i=0;i<n;i++){
        max[i]=math[i]+english[i]+Clanguage[i];
    }
    int j,k;
    double t;
    char change[20];
    for(i=0;i<n-1;i++)
    {
            k=i;
        for(j=i+1;j<n;j++)
        {
            if(max[j]<max[k])
            k=j;
        }
        if(k!=i)
        {
            t=max[i];
            strcpy(change,name[i]);
            max[i]=max[k];
            strcpy(name[i],name[k]);
            max[k]=t;
            strcpy(name[k],change);
        }
    }
    for(i=0;i<n;i++){
        printf("%s %.2f\n",name[i],max[i]);
    }
}

void find_my(char name[][20],double math[],double english[],double Clanguage[])
{
    char names[20];
    printf("请输入你要查找的人的名字：");
    int flag=0;
    scanf("%s",names);

    for(int i=0;i<n;i++){
        if(strcmp(names,name[i])==0){
            printf("他的成绩:Math %.2lf English %.2lf Clanguage %.2lf",math[i],english[i],Clanguage[i]);
            flag=1;
        }
    }
         if(flag==0)
         printf("查无此人，确保正确后输入！\n");
}

void jige(char name[][20],double math[],double english[],double Clanguage[])
{
    printf("及格学生如下：\n");
    int flag=0;
    int i;
    for(i=0;i<n;i++)
    {
      if(math[i]>=60)
        flag+=1;
      if(english[i]>=60)
        flag+=1;
      if(Clanguage[i]>=60)
        flag+=1;
    if(flag==3)
        printf("%s Math%.2lf English%.2lf Clanguage%.2lf",name[i],math[i],english[i],Clanguage[i]);
     else flag=0;
    }
}

void averange(char name[][20],double math[],double english[],double Clanguage[])
{
    printf("学生平均成绩：\n");
    double aver=0;
    int i=0;
    double m=0,e=0,c=0;
    for(i=0;i<n;i++)
    {
        aver+=math[i]+english[i]+Clanguage[i];
        m+=math[i];
        e+=english[i];
        c+=Clanguage[i];
    }
    printf("个体综合平均：%.4f\n",aver/n);
    printf("Math平均：%.4f\n",m/n);
    printf("English平均：%.4f\n",e/n);
    printf("Clanguage平均：%.4f\n",c/n);
}