difference between someone

Question

#include <iostream>
using namespace std;

int main()
{
int x = 1;
do {
cout <<"this is loop" << endl;
} while (x <= 15);

return 0;
}

and

#include <iostream>
using namespace std;

int main()
{
int x = 1;
do {
cout <<"this is loop" << endl;
x++;
} while (x <= 15);

return 0;
}

the first one loop shows time limit exceed at the end of the line
and the 2nd one showing correct (msg) at 15 times

Answer 1

you're missing x++; in the first one, it times out because it won't stop printing "this is a loop" because x never changes.