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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3. #include <string.h>
  4.  
  5. #define SIZE 30
  6.  
  7. char* invertStr(const char *source)
  8. {   
  9.     int size = strlen(source);
  10.  
  11.     char *inverted = malloc(sizeof(source) * (size + 1));
  12.  
  13.     int count = size;
  14.  
  15.     for (int i = 0; i < size; i++)
  16.     {
  17.         inverted[i] = source[count];
  18.         count--;
  19.     }
  20.     inverted[size + 1] = ('\0');
  21.  
  22.     return inverted;
  23. }
  24.  
  25. int main(void)
  26. {
  27.     char str[SIZE];
  28.     char str2[SIZE];
  29.  
  30.     scanf("%29s", str);
  31.  
  32.     char *inverted = invertStr(str);
  33.  
  34.     if (inverted == 0)
  35.     {
  36.         printf("NULL Pointer. Memory alocation error");
  37.  
  38.         return -1;
  39.     }
  40.  
  41.     strcpy(str2, inverted);
  42.  
  43.     printf("%s | %s\n", str, str2);
  44.  
  45.     free(inverted);
  46.  
  47.     return EXIT_SUCCESS;
  48. }
Success #stdin #stdout 0s 4788KB
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https://ideone.com/N7K3NT
language:
C (gcc 8.3)
created:
3 years ago
visibility:
public

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