C++制作简单计算器

C++制作简单计算器

| 加法| 减法 | 求余 | | 乘法| 除法 | 平方根|
主要使用平台
1.VScode
2.Qt
3.linux
4.windows

代码=

#include 
#include 

using namespace std;

namespace calc
{
    int i;
    int j;
    char buf='0';
}
int main(int argc, char const *argv[])
{
    cout<<"程序员计算器\n\n";
    while(1)
    {   int cin_value;   
        cout<<"输入 1 计算"<<"| 输入 2 退出"<<" :";
        cin>>cin_value;
        switch(cin_value)
        {
            case 1:
            while(1){
                cout<<"input_value:  ";
                cin>>calc::i>>calc::buf>>calc::j;
                cout<<endl;
                if(calc::buf == '+')
                    cout<<"result: "<<calc::i<<calc::buf<<calc::j<<"="<<calc::i+calc::j<<endl;
                else if(calc::buf == '-')
                    cout<<"result: "<<calc::i<<calc::buf<<calc::j<<"="<<calc::i-calc::j<<endl;
                else if(calc::buf == '*')
                    cout<<"result: "<<calc::i<<calc::buf<<calc::j<<"="<<calc::i*calc::j<<endl;
                else if(calc::buf == '/')
                    cout<<"result: "<<calc::i<<calc::buf<<calc::j<<"="<<calc::i/calc::j<<endl;
                else if(calc::buf == '%')
                    cout<<"result: "<<calc::i<<calc::buf<<calc::j<<"="<<calc::i%calc::j<<endl;
                else if(calc::buf == 'q')
                    cout<<"平方根(i+i)result: "<<sqrt((double)calc::i+calc::j)<<endl;
                else if ('a'<calc::buf<'z' || 'A'<calc::buf<'Z')
                {
                    cout<<"输入错误，byby\n";
                    break;   
                }
            }
            break;
                
            case 2:
                exit(0);
        }

    }
        return 0;
}