https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77807
Bug ID: 77807
Summary: Problem with for loop condition
Product: gcc
Version: 5.4.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: antoine.sauma at tre dot se
Target Milestone: ---
Here is the code:
#include <cstdlib>
#include <iostream>
using namespace std;
int main(int argc, char** argv) {
long double ld = 1;
for (unsigned long n = 0; n < 100 && ld > 0.1; n++) {
cout << n << endl << flush;
ld = 1/(n + 1);
}
return 0;
}
The loop should stop if n becomes >= 100 or if ld becomes <= 0.1, which should
occur when n is 9. However, compiled with g++ version 5.4.0 on Ubuntu 16.04,
when I run the program I get:
0
1
What is happening???
