#include <stdio.h>  #include <ctype.h>     char *string_uppercase(char *string)   {     char *starting_address;        starting_address = string;        while (*string)       toupper(*string++);        return(starting_address);   }     int main(void)   {     char *title = "Jamsa's 1001 C/C++ Tips";     char *string;        string = string_uppercase(title);     printf("%s\n", string);        printf("%s\n", string_uppercase("Arrays and Pointers"));     return 1;   }