ponteiros.c

/********************
 * Exemplo maluco por Luiz Felipe.
 *
 * https://github.com/Silva97
 ********************/

#include <stdio.h>

#define UCHARPTR (unsigned char *)

int  length(unsigned char *addr);
void print(char *text);

int main(){
    char *text  = "Hello World!",
         *never = "I never be printed! NEVER!",
         *other = "\rHi.";
    int flen    = length(UCHARPTR print);
    
    print(text);
    print("Hello World!" + *other);
    
    printf("> 4 + 12 = %d\n", ((int (*)(int, int)) print+flen)(4, 12));
    
    return 0;
}

int length(unsigned char *addr){
    int i;
    for(i = 0; *addr++ != 0xC3; i++);
    return i+1;
}

void print(char *text){    
    printf("Text: %s\n", text);
}

int sum(int x, int y){
    return x + y;
}