>>909
#include<stdio.h>
int main(void)
{
typedef struct {
char* ques;
double ans;
} DATA;

DATA data[] = {{"15+6", 15+6}, {"20÷5", 20/5}, {"10*8", 10*8}, {"１２*（５+１０）", 12*(5+10)}, {"10+2", 10+2}};
int i, sum;
double input;

for(i=0, sum=0; i<sizeof(data)/sizeof(data[0]); i++)
{
printf("問題%d\n%s = ", i+1, data[i].ques);
scanf("%lf", &input);
if(input == data[i].ans)
{
printf("正解！\n");
sum++;
}
else
{
printf("不正解！\n");
}
}
printf("正解数：%d\n", sum);
return 0;
}