C++ 如何在同一行中进行 cin 和 cout？

Question

So I'm trying to code a program for my project and I'm pretty much done. Now all I want to do is make the console look a little more designed for example:

cout<<"\t\t\t\t\t\t                 Please Login With Admin Credentials!"<<endl;
cout<<"\t\t\t\t\t\t                  ==================================="<<endl;
cout<<"\t\t\t\t\t\t                  +   [=] Enter Username:           +"<<endl;
cout<<"\t\t\t\t\t\t                  +   [=] Enter Password:           +"<<endl;
cout<<"\t\t\t\t\t\t                  ==================================="<<endl;

Now I want the user to input username and password in this specific piece of somewhat of a design. As you can see I want the username and password to be input before the +. Is it possible?

Answer 1

You can't use backspace to get back to previous lines, but you can use cin during execution.

If you consider the following:

std::string something, something2;

cout<<"                 Please Login With Admin Credentials!"<<endl;
cout<<"                  ==================================="<<endl;
cout<<"                  +   [=] Enter Username:           +";

for (int i = 1; i <= 12; i++) {
    std::cout << '\b'; // ---------- backspace 12 times
}
std::cin >> something;

cout<<"                  +   [=] Enter Password:           +";

for (int i = 1; i <= 12; i++) {
    std::cout << '\b'; // ---------- backspace 12 times
}
std::cin >> something2;

cout<<"                  ==================================="<<endl;

Will output something like:

Please Login With Admin Credentials!
 ===================================
 +   [=] Enter Username:hello      + // takes input 1
 +   [=] Enter Password:howareyou  + // takes input 2
 ===================================

From my aspect, this is the easiest way to achieve your requirement without any code complexity.

Answer 2

I followed Alex's advice of using HANDLE hStdout = GetStdHandle(STD_OUTPUT_HANDLE); SetConsoleCursorPosition(hStdout, { 1, 1 }); HANDLE hStdout = GetStdHandle(STD_OUTPUT_HANDLE); SetConsoleCursorPosition(hStdout, { 1, 1 }); under Windows.h library & it works just fine. Just had to figure out the coordinates for my cursor.