给我的c语言程序改错题: 实现加减乘除四则运算答:include<stdio.h>void main(){ int a,b,d; char ch;printf("input three: ");scanf("%d%c%d",&a,&ch,&b);switch(ch){case'+':d=a+b;printf("%d+%d=%d\n",a,b,d);break;case'-':d=a-b;printf("%d-%d=%d\n",a,b,d);break;case'*':d=a*b;printf("%d*%d=%d\...