Placing Printed text in the same line as text before it - c++

Question

I'm currently making a basic program design to behave somewhat like a chell. The code is here:
#include <iostream>
#include <cstdlib>
#include <time.h>
#include <Windows.h>
#include <Stdio.h>
#include <string>
using namespace std;
main()
{
SetConsoleTextAttribute (GetStdHandle(STD_OUTPUT_HANDLE),10);
std::string name;
std::string pass;
std::string msg;
int x = 1;
srand(time(0));
cout << "Booting up system..." << endl;
cout << "Serial Code: " << (rand()%1000) << "." << endl;
cout << "Username: ";
std::getline(std::cin, name);
cout << "Password: ";
std::getline(std::cin, pass);
cout << "" << endl;
while (true)
{
cout<<x<<": ";
std::getline(std::cin, msg);
x += 1;
if (msg == "Hello!"){
cout << "Hi!" << endl;
}
if (msg == ""){
cout << "[No Text Inserted]" << endl;
}
system ("pause");
}
And, if no text is input it displays:
1:
[No Text Inserted]
How do I get this output?
1: [No Text Inserted]
Thank you in advance!
-DJ

Answer 1

In your if statements, store the string into a variable and print out in the end. Also if you're comparing the same variable, I recommend using if else statements. It makes it more readable. So:
string output;
if (msg == "Hello!)
{
output = "Hi!";
}
else if (msg == "")
{
output = "[No Text Inserted]";
}
output = x.str() + ": " + output;
cout << output << endl;
Try that out and let me know if that works.

Answer 2

What you could do is remember input cursor position and if the input is empty string, go back to that position and print your fail message, something like this:
#include <iostream>
#include <string>
#include <windows.h>
int main()
{
HANDLE conout = GetStdHandle(STD_OUTPUT_HANDLE);
std::string input;
std::cout << "Enter something: ";
// remember cursor position
CONSOLE_SCREEN_BUFFER_INFO info;
COORD inputPos = GetConsoleScreenBufferInfo(conout, &info) ? info.dwCursorPosition : COORD{ 0, 0 };
if (!std::getline(std::cin, input) || input.empty())
{
SetConsoleCursorPosition(conout, inputPos);
std::cout << "[No Text Inserted]" << std::endl;
}
}