I copied this code from C++ Primer as an example for while loops, and it doesn't output anything. I'm using g++.
#include <iostream>
int main()
{
int sum = 0, val = 1;
// keep executing the while as long val is less than or equal to 10
while (val <= 10) {
sum += val; // assigns sum+ val to sum\
++val; // add 1 to val
}
std::cout << "Sum of 1 to 10 inclusive is "
<< sum << std::endl;
return 0;
}
sum += val; // assigns sum+ val to sum\
Get rid of the backslash at the end of the line. That's a line continuation character. It causes the next line to be concatenated to this line; in other words, ++val becomes part of the "assigns sum+ val to sum" comment.
sum += val; // assigns sum+ val to sum\ <-- typo
++val; // add 1 to val
You got a typo at that sum += val; line. The "\" at the end make the following line a comment, thus making the while an infinite loop as val was never increased. Remove "\", then it would work.
It's a simple mistake, remove the \ after the comment "// assigns sum+ val to sum".
