Pointers to char strings are by convention terminated with the value \0. The following function implements a string equality test. Note its use of pointer arithmetic. The construct *s1++ means dereference the pointer s1, and after using this value in the expression, add 1 to its pointer value.

bool streq(const char* s1, const char* s2)
{
 while (*s1 != 0 && *s2 != 0)
   if (*s1++ != *s2++)
     return false;
 return (*s1 == *s2);
}

bool strneq(const char* s1, const char* s2, int n);

that returns true if the first n characters of the two strings are the same and otherwise returns false.
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