四则运算测试系统

系统包括加、减、乘、除四种基本运算，包含显示答卷、错题正解、系统评估、错题重做、退出系统五种功能，由七个小子函数和主函数构成。

#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <ctype.h>  

int sy[10],sr[10],jd[10],jg[10];                                                                       
int fs=0;                 
char fh[10];               

void division(int *s1,int *s2,int *s3);
void calculate();
char menu();
void evaluate();
void answer();
void Ranswer();
void reform();

void main()
{
    int key=1;
    calculate();
    while(key)
    {
        switch(menu())
        {
            case  '1':   {   printf("


"); answer();    }    break;
            case  '2':   {   printf("


"); Ranswer();  }     break;
            case  '3':   {   printf("


"); evaluate();   }   break;
            case  '4':   {   printf("


"); reform();  }      break;
            case  '0':   {   printf("
您已退出四则运算系统，谢谢支持!

");key=0;}
        }
    }
}


void division(int *s1,int *s2,int *s3)
{
    int i,b=1,c,jg;         
    int cs[20]={0},sy,sr;         
    srand( (unsigned)time( NULL ) );
    fa: sy=rand()%100;
    if(sy==0)   goto fa;
    for(i=1;i<=sy;i++)         
    {    
        if(sy%i==0)  {  cs[b]=i;  b++;}
        else  continue;
    }                          
    c=rand()%b;            
    if(c==0)  c=c+1;
    sr=cs[c];
    jg=sy/sr;
    *s1=sy;                    
    *s2=sr;
    *s3=jg;
}


void calculate()
{    
    int p;                    
    int i,gh;                 
    printf("欢迎来到四则运算测试系统!

您将进行的是100以内数字的四则运算!Are you ready?Go!

");
    srand( (unsigned)time( NULL ) ); 
    
    
    for(i=0;i<10;i++)
    {
        sy[i]=rand()%100;              
        sr[i]=rand()%100;              
        p=rand()%4;                   
        
        if(p==0)                    
        {    fh[i]='+'; jg[i]=sy[i]+sr[i]; }        
        else  if(p==1)                  
        {    fh[i]='-';  
        if(sy[i]<sr[i]) { gh=sy[i]; sy[i]=sr[i];sr[i]=gh; }  
            jg[i]=sy[i]-sr[i];                  
        }    
        else  if(p==2)                  
        {   fh[i]='*'; jg[i]=sy[i]*sr[i]; }                   
        else  if(p==3)
        {   
            fh[i]='/';                  
            division(&sy[i],&sr[i],&jg[i]);  
        }
        printf("第%2d题: %2d %c %2d =  ",i+1,sy[i],fh[i],sr[i]);  

        scanf("%d",&jd[i]);              
        if(jd[i]==jg[i])  fs+=10;        
        }                                    
    printf("
测试结束!

");    
}

   
char menu()
{
   char  c='0';                    
   printf("
************ 四则运算测试系统 **************


");
   printf("          1.显示答卷        2.错题正解

");
   printf("          3.系统评估        4.错题重做

");
   printf("          0.退出系统

"); 
   printf("
********************************************");
   printf("
请输入选项(0-4):");      
   do
   {   scanf("%c",&c);   }          
   while(!(c>'0'&&c<='6'));              
   return c;                        
}


void evaluate()
{
    printf("您的成绩是%d分.
",fs);  
    switch(fs)                                      
    {  case  100: printf("Very good!不要骄傲哦!
");  break;
       case  90:  printf("优秀!恭喜您取得了好成绩!
");  break;
       case  80:
       case  70:  printf("良好!请继续努力,下次取得更好的成绩!
");  break;
       case  60:  printf("及格!成绩不太理想哟!再接再励吧!
");  break;
       case  50:
       case  40:
       case  30:
       case  20:
       case  10:  printf("多花点功夫吧,不然你会后悔的!!
");  break;
       case  0:   printf("太差劲了!再不努力的话,会后悔的哦!再做一次吧!!!!
");  break;
    }
    printf("

");
}           


void answer()
{
    int j;
    printf("您的答卷为:
");
    for(j=0;j<10;j++)
        printf("%2d %c %2d = %2d
",sy[j],fh[j],sr[j],jd[j]);
    printf("

");
}


void Ranswer()
{
    int k;
    printf("您答错的题的正确答案为:
");
    for(k=0;k<10;k++)
    {   if(jd[k]==jg[k])   continue;
        else
        {
            printf("%2d %c %2d = %2d
",sy[k],fh[k],sr[k],jg[k]);
        }
    }
    printf("

");
}


void reform()
{
    int m,n;
    printf("以下是您做错的题,请重做:
");
    for(m=0;m<10;m++)                      
        if(jd[m]==jg[m])    continue;       
        else  
        {   printf("%2d %c %2d =",sy[m],fh[m],sr[m]);
            scanf("%d",&jd[m]);
            if(jd[m]==jg[m])  printf("恭喜!您做对了!
");
            else                                        
            {   
                for(n=0;n<3;n++)
                {  printf("仍未做对!您只有%d次机会了哦:   ",2-n);
                      printf("%2d %c %2d =",sy[m],fh[m],sr[m]);
                          scanf("%d",&jd[m]);                         
                          if(jd[m]==jg[m])   { printf("恭喜!您做对了!
");  break;}
                }
            
             }                                       
        }                                                
    printf("

");
}