ex3_7.cpp

C++程序设计课本源码,供学习计算机的大学生们参考

#include <iostream.h>
void main(){
	float num1,num2;
	char op;
	cout<<"输入操作数1，运算符，操作数2："<<endl;
	cin>>num1>>op>>num2;
	switch(op){
		case '+':  cout<<num1<<op<<num2<<"="<<num1+num2<<endl; break;
		case '-':  cout<<num1<<op<<num2<<"="<<num1-num2<<endl; break;
		case '*':  cout<<num1<<op<<num2<<"="<<num1*num2<<endl; break;
		case '/':  cout<<num1<<op<<num2<<"="<<num1/num2<<endl; break;
		default :  cout<<op<<"是无效运算符!";
	}
}