设计一个简单的计算器,完成两个数的加减乘除.

#include "stdio.h" void main() { float x,y; char op; scanf("%f%c%f",&x,&op,&y) ; switch(op) { case '+':printf("%.2f%c%.2f=%.2f\n",x,op,y,x+y);break; case '-':printf("%.2f%c%.2f=%.2f\n",x,op,y,x-y);break; case '*':printf("%.2f%c%.2f=%.2f\n",x,op,y,x*y);break; case '/': {if (y==0.0) printf("error!"); else printf("%.2f%c%.2f=%.2f\n",x,op,y,x/y);}break; } }