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。

  1 #include <stdio.h>
  2 #include <stdlib.h>
  3 #include <time.h>
  4 #include <ctype.h>
  5
  6 int sy[10],sr[10],jd[10],jg[10];
  7 int fs=0;
  8 char fh[10];
  9
 10 void division(int *s1,int *s2,int *s3);
 11 void calculate();
 12 char menu();
 13 void evaluate();
 14 void answer();
 15 void Ranswer();
 16 void reform();
 17
 18 void main()
 19 {
 20     int key=1;
 21     calculate();
 22     while(key)
 23     {
 24         switch(menu())
 25         {
 26             case  ‘1‘:   {   printf("\n\n\n"); answer();    }    break;
 27             case  ‘2‘:   {   printf("\n\n\n"); Ranswer();  }     break;
 28             case  ‘3‘:   {   printf("\n\n\n"); evaluate();   }   break;
 29             case  ‘4‘:   {   printf("\n\n\n"); reform();  }      break;
 30             case  ‘0‘:   {   printf("\n您已退出四则运算系统，谢谢支持!\n\n");key=0;}
 31         }
 32     }
 33 }
 34
 35
 36 void division(int *s1,int *s2,int *s3)
 37 {
 38     int i,b=1,c,jg;
 39     int cs[20]={0},sy,sr;
 40     srand( (unsigned)time( NULL ) );
 41     fa: sy=rand()%100;
 42     if(sy==0)   goto fa;
 43     for(i=1;i<=sy;i++)
 44     {
 45         if(sy%i==0)  {  cs[b]=i;  b++;}
 46         else  continue;
 47     }
 48     c=rand()%b;
 49     if(c==0)  c=c+1;
 50     sr=cs[c];
 51     jg=sy/sr;
 52     *s1=sy;
 53     *s2=sr;
 54     *s3=jg;
 55 }
 56
 57
 58 void calculate()
 59 {
 60     int p;
 61     int i,gh;
 62     printf("欢迎来到四则运算测试系统!\n\n您将进行的是100以内数字的四则运算!Are you ready?Go!\n\n");
 63     srand( (unsigned)time( NULL ) );
 64
 65
 66     for(i=0;i<10;i++)
 67     {
 68         sy[i]=rand()%100;
 69         sr[i]=rand()%100;
 70         p=rand()%4;
 71
 72         if(p==0)
 73         {    fh[i]=‘+‘; jg[i]=sy[i]+sr[i]; }
 74         else  if(p==1)
 75         {    fh[i]=‘-‘;
 76         if(sy[i]<sr[i]) { gh=sy[i]; sy[i]=sr[i];sr[i]=gh; }
 77             jg[i]=sy[i]-sr[i];
 78         }
 79         else  if(p==2)
 80         {   fh[i]=‘*‘; jg[i]=sy[i]*sr[i]; }
 81         else  if(p==3)
 82         {
 83             fh[i]=‘/‘;
 84             division(&sy[i],&sr[i],&jg[i]);
 85         }
 86         printf("第%2d题: %2d %c %2d =  ",i+1,sy[i],fh[i],sr[i]);
 87
 88         scanf("%d",&jd[i]);
 89         if(jd[i]==jg[i])  fs+=10;
 90         }
 91     printf("\n测试结束!\n\n");
 92 }
 93
 94
 95 char menu()
 96 {
 97    char  c=‘0‘;
 98    printf("\n************ 四则运算测试系统 **************\n\n\n");
 99    printf("          1.显示答卷        2.错题正解\n\n");
100    printf("          3.系统评估        4.错题重做\n\n");
101    printf("          0.退出系统\n\n");
102    printf("\n********************************************");
103    printf("\n请输入选项(0-4):");
104    do
105    {   scanf("%c",&c);   }
106    while(!(c>‘0‘&&c<=‘6‘));
107    return c;
108 }
109
110
111 void evaluate()
112 {
113     printf("您的成绩是%d分.\n",fs);
114     switch(fs)
115     {  case  100: printf("Very good!不要骄傲哦!\n");  break;
116        case  90:  printf("优秀!恭喜您取得了好成绩!\n");  break;
117        case  80:
118        case  70:  printf("良好!请继续努力,下次取得更好的成绩!\n");  break;
119        case  60:  printf("及格!成绩不太理想哟!再接再励吧!\n");  break;
120        case  50:
121        case  40:
122        case  30:
123        case  20:
124        case  10:  printf("多花点功夫吧,不然你会后悔的!!\n");  break;
125        case  0:   printf("太差劲了!再不努力的话,会后悔的哦!再做一次吧!!!!\n");  break;
126     }
127     printf("\n\n");
128 }
129
130
131 void answer()
132 {
133     int j;
134     printf("您的答卷为:\n");
135     for(j=0;j<10;j++)
136         printf("%2d %c %2d = %2d\n",sy[j],fh[j],sr[j],jd[j]);
137     printf("\n\n");
138 }
139
140
141 void Ranswer()
142 {
143     int k;
144     printf("您答错的题的正确答案为:\n");
145     for(k=0;k<10;k++)
146     {   if(jd[k]==jg[k])   continue;
147         else
148         {
149             printf("%2d %c %2d = %2d\n",sy[k],fh[k],sr[k],jg[k]);
150         }
151     }
152     printf("\n\n");
153 }
154
155
156 void reform()
157 {
158     int m,n;
159     printf("以下是您做错的题,请重做:\n");
160     for(m=0;m<10;m++)
161         if(jd[m]==jg[m])    continue;
162         else
163         {   printf("%2d %c %2d =",sy[m],fh[m],sr[m]);
164             scanf("%d",&jd[m]);
165             if(jd[m]==jg[m])  printf("恭喜!您做对了!\n");
166             else
167             {
168                 for(n=0;n<3;n++)
169                 {  printf("仍未做对!您只有%d次机会了哦:   ",2-n);
170                       printf("%2d %c %2d =",sy[m],fh[m],sr[m]);
171                           scanf("%d",&jd[m]);
172                           if(jd[m]==jg[m])   { printf("恭喜!您做对了!\n");  break;}
173                 }
174
175              }
176         }
177     printf("\n\n");
178 }