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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 len = myStrlen(s);
  13.     int total = len * 2;
  14.     int i;
  15.  
  16.     tmp = (char *)malloc((total + 1) * sizeof(char));
  17.  
  18.     for(i = 0; i < len; i++){
  19.         tmp[i] = s[i];
  20.     }
  21.  
  22.     for(i = 0; i < len; i++){
  23.         tmp[len + i] = s[len - 1 - i];
  24.     }
  25.  
  26.     tmp[total] = '\0';
  27.  
  28.     return tmp;
  29. }
  30.  
  31. int main(){
  32.     int i;
  33.     char nyuryoku[1024];
  34.     char *kaibun;  
  35.     scanf("%s", nyuryoku);
  36.     kaibun = setPalindrome(nyuryoku);
  37.     printf("%s\n  -> %s\n", nyuryoku, kaibun);
  38.     free(kaibun);
  39.     return 0;
  40. }
  41.  
Success #stdin #stdout 0.01s 5280KB
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stdin
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abc
stdout
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abc
  -> abccba
https://ideone.com/G9HBxX
language:
C (gcc 8.3)
created:
2 days ago
visibility:
public

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