Stop Code in C++

Question

How do you stop the code from running in C++? I have the code

#include <iostream>
#include <cmath>
using namespace std;
int main() {
    int total, sub, subc;
    cout << "What number would you like to start with? ";
    cin >> total;
        cout << "Enter in a number, 1 or 2, to subtract";
    cin >> sub;
    if (sub == 1) {
        total--;
        subc++;
        cout << "You subtracted one";
    }
    else {
        total = total - 2;
        subc++;
    }
    if (sub <= 0)
        cout << "YAY!";
}

and i want to insert a thing that just stops the code and exits right after cout << "YAY!" how do i do that???

... like by changing that to `if (sub <= 0) { cout << "YAY!"; return 0; }` (assuming you'd change the rest of the code to run in a loop first)? :) — Frg, Feb 26 '12 at 23:45
Would it be asking to much that you learn the basics of C++ control flow and then revisit your problem? There are no loops in your program and no recursion, so it is inevitable that your program terminates eventually. — Kerrek SB, Feb 26 '12 at 23:50
Edited quested to be more clear. I'm pretty sure Solomon meant to pause the program before it exits. Replaced "stop" with "pause". — Emile Cormier, Feb 26 '12 at 23:51

David Robinson · Accepted Answer · 2012-02-26T23:51:40.333

A return statement will end the main function and therefore the program:

return 0;

ETA: Though as @Mysticial notes, this program will indeed end right after the cout << "YAY!" line.

ETA: If you are in fact working within a while loop, the best way to leave the loop would be to use a break statement:

#include <iostream>
#include <cmath>
using namespace std;
int main() {
    int total, sub, subc;
    cout << "What number would you like to start with? ";
    cin >> total;
    while (1) {
            cout << "Enter in a number, 1 or 2, to subtract";
        cin >> sub;
        if (sub == 1) {
            total--;
            subc++;
            cout << "You subtracted one";
        }
        else {
            total = total - 2;
            subc++;
        }
        if (sub <= 0) {
            cout << "YAY!";
            break;
        }
    }
}

I get the feeling there's a while loop yet to be written. – DSM Feb 26 '12 at 23:46 — DSM, Feb 26 '12 at 23:46

perreal · Answer 2 · 2012-02-26T23:52:40.380

1

try:

 char c;
 cin >> c;

This will wait until you hit enter before exiting.

or you can do:

#include <stdlib.h>
system("pause");

edited Feb 26 '12 at 23:52

answered Feb 26 '12 at 23:46

perreal

94,503
21
155
181

score 0 · Answer 3 · answered Dec 18 '12 at 12:11

As David Robinson already noted, your example makes no sense, since the program will stop anyway after

cout << "YAY!";

But depending on the scenario, besides break and return, also exit() might help. See the manpage:

http://www.cplusplus.com/reference/cstdlib/exit/

Stop Code in C++

3 Answers3