Programar em C: Exercícios Finais: Exercício 12

 #include <stdio.h>
 #include <stdlib.h>
 main()
  {
    void troca(int);
    int i;
    i = 5;
    printf("antes i=%d\n", i);
    troca(i);
    printf("depois i=%d\n", i);
    system (“pause”);
    return 0;
  }
 void troca(int x)
  {
    while(x)
      {
        printf("troca: x=%d\n", x);
        x--;
      }
  }
 
 
 
/*
* Recursive descent parser for simple C expressions.
* Very little error checking.
*/