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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3.  
  4. #define SUCESSO 0
  5. #define FALHA -1
  6.  
  7. typedef struct {
  8.     int x;
  9.     int y;
  10. } Ponto;
  11.  
  12. void criarPonto(Ponto **ponto) {
  13.     (*ponto) = (Ponto *)NULL;
  14. }
  15.  
  16. int preencherPonto(Ponto **ponto, int x, int y) {
  17.     *ponto = malloc(sizeof(Ponto));
  18.     if (*ponto == NULL) return FALHA;
  19.     (*ponto)->x = x;
  20.     (*ponto)->y = y;
  21.     return SUCESSO;
  22. }
  23. int main() {
  24.     Ponto *ponto;
  25.     criarPonto(&ponto);
  26.     printf("O endereco de memoria é: %p\n", (void *)ponto);
  27.     if (preencherPonto(&ponto, 0, 1) == FALHA) return FALHA;
  28.     printf("O endereco de memoria é: %p\n", (void *)ponto);
  29.     printf("Coordenada X: %d\n", ponto->x);
  30.     printf("Coordenada Y: %d\n", ponto->y);
  31.     return SUCESSO;
  32. }
  33.  
  34. //https://pt.stackoverflow.com/q/307590/101
Success #stdin #stdout 0s 4364KB
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stdin
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Standard input is empty
stdout
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O endereco de memoria é: (nil)
O endereco de memoria é: 0x55b7be6c6270
Coordenada X: 0
Coordenada Y: 1
https://ideone.com/zXWwP8
language:
C99 (gcc 8.3)
created:
5 years ago
visibility:
public

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