Thread: incrementing a pointer

Code:

void printCharacters( const char *ptStr ){
   for( ; *ptStr!='\0'; ++ptStr) {
        printf("%c",*ptStr);
}
}

In this function ptStr points to a char, and char is 1byte, so ++ptStr means "point to the next byte"? If the array is of type int, then how to increment the pointer when looping through elemets? ++ptStr or ptStr+=4 (because int is 4byte)???