小编Dom*_*Dom的帖子

我不知道为什么这不起作用,我需要交换两个字符作为a和b输入,它编译,但所有的字符被替换为输入为b的字符,任何建议？

while (n != exist)
{
    cout<<"What is the letter you want to swap?"<<endl;
    cin>>a;             
    cout<<"What is the letter you want to swap it with?"<<endl;
    cin>>b;
    if (inFile.is_open())
    {
        while (inFile.good())
        {   
            inFile.get(c);
            if( c = a )
            {
                outFile<< b;
            }
            else if (c = b)
            {
                outFile<< a;
            }
            else
            {
                outFile<< c;
            }                               
        }                           
    }
    else
    {
        cout<<"Please run the decrypt."<<endl;
    }
    cout<<"Another letter? <n> to stop swapping"<<endl;
    cin>>n;
}