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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3.  
  4. int myStrlen(char s[]){
  5.     int i;
  6.     for(i=0;s[i]!='\0';i++);
  7.     return i;
  8. }
  9.  
  10. char *setPalindrome(char s[]){
  11. 	char *tmp;
  12. 	int i, j, size = myStrlen(s);
  13.  
  14. 	tmp = (char*)malloc(sizeof(char) * (size * 2 + 1));
  15.  
  16. 	if(tmp == NULL)
  17. 	{
  18. 		printf("ERROR\n");
  19. 		return 0;
  20. 	}
  21.  
  22. 	for(i=0; i<size; i++)
  23. 	{
  24. 		tmp[i] = s[i];
  25. 	}
  26.  
  27. 	for(j=0; j<size; j++)
  28. 	{
  29. 		tmp[i+j] = s[size-j-1];
  30. 	}
  31.  
  32. 	tmp[i+j] = '\0';
  33.  
  34. 	return tmp;
  35. }
  36.  
  37. int main(){
  38.     int i;
  39.     char nyuryoku[1024]; 
  40.     char *kaibun;   
  41.     scanf("%s",nyuryoku);
  42.     kaibun = setPalindrome(nyuryoku);
  43.     printf("%s\n  -> %s\n",nyuryoku,kaibun);
  44.     free(kaibun);
  45.     return 0;
  46. }
  47.  
Success #stdin #stdout 0s 5268KB
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stdin
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abcd
stdout
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abcd
  -> abcddcba
https://ideone.com/vwdHgf
language:
C (gcc 8.3)
created:
6 hours ago
visibility:
public

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