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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.     int i,size;
  12.     char *tmp;
  13.     size = myStrlen(s);
  14.     tmp = (char *)malloc(sizeof(char)*(2*size+1));
  15.     if(tmp == NULL){
  16.         printf("エラー\n");
  17.         return NULL; 
  18.     }
  19.     for(i=0;i<size;i++) tmp[i] = s[i];
  20.     for(i=0;i<size;i++) tmp[i+size] = s[size-i-1];
  21.     tmp[2*size] = '\0';
  22.     return tmp;
  23. }
  24.  
  25.  
  26. int main(){
  27.     int i;
  28.     char nyuryoku[1024]; 
  29.     char *kaibun;   
  30.     scanf("%s",nyuryoku);
  31.     kaibun = setPalindrome(nyuryoku);
  32.     printf("%s\n  -> %s\n",nyuryoku,kaibun);
  33.     free(kaibun);
  34.     return 0;
  35. }
  36.  
Success #stdin #stdout 0.01s 5288KB
comments (?)
stdin
copy 
abcd
stdout
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abcd
  -> abcddcba
https://ideone.com/48DG1T
language:
C (gcc 8.3)
created:
8 days ago
visibility:
public

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