Function in c that increments a variable

Question

I want to develop a function which increments in 1 any variable that you pass by argument. I did this, but I know it's wrong:

#include <stdio.h> 

int incremento(int);

int main(int argc, char** argv){
    int x = 1;
    printf("%d", x);
    incremento(x);
    printf("%d", x);

    return 0; 
}

int incremento(int n){
    n++;
    return n; 
}

Thanks

Answer 1

#include <stdio.h> 

void incremento(int *);

int main(int argc, char** argv){
  int x = 1;
  printf("%d", x);
  incremento(&x);
  printf("%d", x);

  return 0; 
 }

void incremento(int *n){
  (*n)++;
}