Unsigned and signed comparison

Question

Here is very simple code,

#include 
using namespace std;
int main() {
    unsigned int u=10;
    int i;
    int count=0;
    for (i=-1;i<=         


        

Answer 1

Its because -1 is casted as an unsigned int, so the for loop code is never executed.

Try compiling with -Wall -Wextra so you can get the respective warnings (if not getting them so far, and compiling with g++)

http://en.wikipedia.org/wiki/Two's_complement