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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 size = myStrlen(s);
  13. 	tmp = (char *)malloc(sizeof(char)*(2*size+1)); //領域の確保
  14. 	if(tmp == NULL){
  15. 		printf("ERROR\n");
  16.  
  17. 		return NULL;
  18. 	}
  19.  
  20. 	for(int i=0;i<size;i++){
  21. 	    tmp[i] =s[i];
  22. 	}
  23.  
  24.     for (int i = 0; i < size; i++) {
  25.         tmp[size + i] = s[size - 1 - i];
  26.     }
  27.     tmp[2 * size] = '\0';
  28.  
  29.     return tmp;
  30.  
  31.     free(tmp);
  32. }
  33.  
  34. //メイン関数はいじる必要はありません
  35. int main(){
  36.     int i;
  37.     char nyuryoku[1024]; //入力
  38.     char *kaibun;   //回文を受け取る
  39.     scanf("%s",nyuryoku);
  40.     kaibun = setPalindrome(nyuryoku);
  41.     printf("%s\n  -> %s\n",nyuryoku,kaibun);
  42.     free(kaibun);
  43.     return 0;
  44. }
  45.  
Success #stdin #stdout 0.01s 5284KB
comments (?)
stdin 
abcd
stdout 
abcd
  -> abcddcba
https://ideone.com/uIV6bC
language:
C (gcc 8.3)
created:
8 days ago
visibility:
public

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