Or and not equal

Question

Why does this work?

#include 
#include 
using namespace std;
int main(){
string s=\"a\";
if((s==\"cm\")||(s==\"in\")||(s==\"ft\")||         


        

Answer 1

You're trying to check whether it's unequal to all of those strings, not whether it's unequal to any of those strings.

Use and, not or.