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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. // 関数の中でtmpに対してmallocして
  11. // そこに回文を代入してreturnで返しましょう
  12. char *setPalindrome(char s[]){
  13. 	char *tmp;
  14. 	tmp = (char*)malloc(sizeof(char)*myStrlen(s));
  15. 	if(tmp == NULL){
  16. 		printf("error");
  17. 		return 0;
  18. 	}
  19.  
  20. 	int j = myStrlen(s)-1;
  21. 	for(int i=0;i<myStrlen(s);i++){
  22. 		tmp[i]=s[j];
  23. 		j--;
  24. 	}
  25. 	char *A;
  26. 	A = (char*)malloc(sizeof(char)*myStrlen(s)*2);
  27. 	if(A == NULL){
  28. 		printf("error");
  29. 		return 0;
  30. 	}
  31. 	for(int k=0;k<myStrlen(s);k++){
  32. 		A[k]=s[k];
  33. 	}
  34. 	int B=0;
  35. 	for(int K=myStrlen(s);K<myStrlen(s)*2;K++){
  36. 		A[K]=tmp[B];
  37. 		B++;
  38. 	}
  39. 	return A;
  40. }
  41.  
  42.  
  43. //メイン関数はいじる必要はありません
  44. int main(){
  45.     int i;
  46.     char nyuryoku[1024]; //入力
  47.     char *kaibun;   //回文を受け取る
  48.     scanf("%s",nyuryoku);
  49.     kaibun = setPalindrome(nyuryoku);
  50.     printf("%s\n  -> %s\n",nyuryoku,kaibun);
  51.     free(kaibun);
  52.     return 0;
  53. }
  54.  
Success #stdin #stdout 0.01s 5276KB
comments (?)
stdin
copy 
asdfghjkl
stdout
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asdfghjkl
  -> asdfghjkllkjhgfdsa
https://ideone.com/tQCNhW
language:
C (gcc 8.3)
created:
5 days ago
visibility:
public

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