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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3. #include <malloc.h>
  4.  
  5. typedef struct cel {
  6.     char conteudo;
  7.     struct cel *prox;
  8. } celula;
  9.  
  10. void empilha(char c, celula *topo) {
  11.     celula *nova = malloc(sizeof(celula));
  12.     nova->conteudo = c;
  13.     nova->prox = topo->prox;
  14.     topo->prox = nova;
  15. }
  16.  
  17. char desempilha(celula *topo) {
  18.     celula *pt = topo->prox;
  19.     char c = pt->conteudo;
  20.     topo->prox = pt->prox;
  21.     free(pt);
  22.     return c;
  23. }
  24.  
  25. int main() {
  26.     char frase[50];
  27.     celula cabeca;
  28.     celula *topo = &cabeca;
  29.     topo->prox = NULL;
  30.     printf("Informe a frase: ");
  31.     fgets(frase, 50, stdin);
  32.     for (int i = 0; frase[i] != '\0'; i++) {
  33.         empilha(frase[i], topo);
  34.     }
  35.     printf("\nInvertida: ");
  36.     while (topo->prox != NULL) {
  37.         putchar(desempilha(topo));
  38.     }
  39.     putchar('\n');
  40.     return 0;
  41. }
Success #stdin #stdout 0s 4544KB
comments (?)
stdin
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abcdefghijklmnopqrstuvwxyz
stdout
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Informe a frase: 
Invertida: 
zyxwvutsrqponmlkjihgfedcba
https://ideone.com/8shebA
language:
C (gcc 8.3)
created:
7 years ago
visibility:
public

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