///////    File strequal.C    ///////
#include <iostream.h>

char a[]= "abcde";
char b[]= "abcde";
char c[]= "abcd";

int strequal(char x[], char y[])          // array formal parameters
{ int i = 0;
      if ( x == y ) return(1);            // same memory locations
      while (x[i] == y[i])
      {     if (x[i] == '\0') return (1); // strings equal
            i++;
      }
        return(0);                        // strings unequal
}
int main()
{   if ( strequal(a,b) )
       cout << "a is equal to b\n";
    if ( ! strequal(b,c))      // ! is logical not
       cout << "b is not equal to c\n";
}