static i;i = 0;if( !i ) { /* do this */ } // i is 0static c[ 2 ];c[ 0 ] = '';if( !c[ 0 ] ) { /* do this */ } // c[ 0 ] is ''c = "";if( !c[ 0 ] ) { /* do this */ } // c[ 0 ] is ''
if (!killer || !victim) // ! in front of id ?
if (killer <= 0 || victim <= 0)