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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("ERROR\n");
  17.         return NULL;
  18.     }
  19.  
  20.     for(i=0;i<size;i++) tmp[i] = s[i];
  21.     for(i=0;i<size;i++) tmp[i+size] = s[size-i-1];
  22.     tmp[2*size] = '\0';
  23.     return tmp;
  24. }
  25.  
  26.  
  27. int main(){
  28.     int i;
  29.     char nyuryoku[1024];
  30.     char *kaibun;
  31.     scanf("%s",nyuryoku);
  32.     kaibun = setPalindrome(nyuryoku);
  33.     printf("%s\n  -> %s\n",nyuryoku,kaibun);
  34.     free(kaibun);
  35.     return 0;
  36. }
  37.  
Success #stdin #stdout 0.01s 5280KB
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stdin
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6
stdout
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6
  -> 66
https://ideone.com/puqynj
language:
C (gcc 8.3)
created:
13 days ago
visibility:
public

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