CalcoloData.c

#include <stdlib.h>
#include <stdio.h>

void increment_age(int *age_plus);

int main() {
    char str[200];
    int age;
    int *age_plus;
    age_plus=&age;

    printf("Inserisci la tua eta': ");
    fgets(str, 200, stdin);
    age = (int) strtol(str, NULL, 10);
    increment_age(age_plus);
    printf("La tua eta' aumentata: %d", *age_plus);
}

void increment_age(int *age_plus) {
    *age_plus =  (*age_plus * 2);
}