#include?<stdlib.h>
#include?<time.h>
const?int?MAXSIZE?=?10;
int?CheckResult(int?anwser,int?result)?{
if(anwser?==?result)?{
printf("對的，繼續努力\n");
return?1;
}
printf("錯了，正確答案是:%d\n",result);
return?0;
}
int?main()?{
int?a,b,t,answer,result;
int?n?=?MAXSIZE,yes?=?0,no?=?0;
char?op,ops[]?=?{"+-*/"};
srand((unsigned)time(NULL));
while(n--)?{
op?=?rand()%4;
switch(ops[op])?{
case?'+'?:?do?{
a?=?rand()%90?+?10;
b?=?rand()%90?+?10;
}while(a?+?b?>=?100);
printf("%d?+?%d?=?",a,b);
scanf("%d",&answer);
if(CheckResult(answer,a?+?b))?++yes;
else?++no;
break;
case?'-'?:?a?=?rand()%90?+?10;
b?=?rand()%90?+?10;
if(a?<?b)?{t?=?a;?a?=?b;?b?=?t; }
printf("%d?-?%d?=?",a,b);
scanf("%d",&answer);
if(CheckResult(answer,a?-?b))?++yes;
else?++no;
break;
case?'*'?:?do?{
a?=?rand()%100;
b?=?rand()%100;
}while(a?*?b?>=?100);
printf("%d?*?%d?=?",a,b);
scanf("%d",&answer);
if(CheckResult(answer,a?*?b))?++yes;
else?++no;
break;
case?'/'?:?do?{
a?=?rand()%90?+?1;
b?=?rand()%90?+?1;
}while(a?%?b?&&?b?%?a);
if(a?%?b)?{t?=?a;?a?=?b;?b?=?t; }
printf("%d?/?%d?=?",a,b);
scanf("%d",&answer);
if(CheckResult(answer,a?/?b))?++yes;
else?++no;
break;
}
}
printf("答對:%d個，答錯:%d個，正確率:%.2lf%%\n",yes,no,100.0?*?yes?/?MAXSIZE);
return?0;
}