课后作业2
码云没弄明白,代码如下
#include <STDIO.H>
main(){
float a,b; char c;
printf("input expression:a+(-,*,/)b\n");
scanf("%f%c%f",&a,&c,&b);
switch(c){
case '+': printf("%f\n",a+b); break;
case '-': printf("%f\n",a-b); break;
case '*': printf("%f\n",a*b); break;
case '/': printf("%f\n",a/b); break;
default:printf("input error\n");
}
}