#include<stdio.h>
int main()
{
int num1, num2;
char ch;
float result;
printf("please input :");
scanf_s("%d %c %d", &num1, &ch, &num2);
switch (ch)
{
case '+':num1 + num2;break;
case '-':result = (float)num1 - num2;break;
case '*':result = (float)num1 * num2;break;
case '/':
if (num2 == 0)
{
printf("你錯了");
break;
}
else
{
result = num1 / num2;
break;
}
}
printf("結果是:%.2f\n", result);
return 0;
}
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