Dear all, First consider this: bool flag = false; while (condition) { ... if ( !flag && ANOTHER_CONDITION ) { .... } } If the "while" loop iterates for 10 times, the both flag and ANOTHER_CONDITION are checked 10 times. Now consider this: bool flag = false; while (condition) { ... if ( !flag && ANOTHER_CONDITION ) { .... flag = true; } } If the "while" loop iterates for 10 times and in the first iteration "flag = true;" is executed, then how many times, ANOTHER_CONDITION is checked? 1 or 10? How does GCC-4.1.3 act to condition precedences? // Naderan *Mahmood;