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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 a=myStrlen(s),b=a*2;
  13. 	tmp=(char *)malloc(sizeof(char)*(a+1));
  14.  
  15. if (tmp==NULL) {
  16.         printf("メモリの確保に失敗しました\n");
  17.         exit(1);
  18.     }
  19.  
  20.     for (int i=0;i<a;i++) {
  21.         tmp[i] = s[i];
  22.     }
  23.  
  24.     for (int i=0;i<a;i++) {
  25.         tmp[a+i]=s[a-1-i];
  26.     }
  27.  
  28.     tmp[b] = '\0';
  29.  
  30.     return tmp;
  31.     }
  32.  
  33. int main(){
  34.     int i;
  35.     char nyuryoku[1024]; 
  36.     char *kaibun;   
  37.     scanf("%s",nyuryoku);
  38.     kaibun = setPalindrome(nyuryoku);
  39.     printf("%s\n  -> %s\n",nyuryoku,kaibun);
  40.     free(kaibun);
  41.     return 0;
  42. }
  43.  
Success #stdin #stdout 0s 5280KB
comments (?)
stdin
copy 
abcd
stdout
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abcd
  -> abcddcba
https://ideone.com/HfokoQ
language:
C (gcc 8.3)
created:
1 day ago
visibility:
public

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