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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3. //2
  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; //void型なので何も返さず終了
  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.  
  27. int main(){
  28.     int i;
  29.     char nyuryoku[1024]; //入力
  30.     char *kaibun;   //回文を受け取る
  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 0s 5288KB
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https://ideone.com/kA9lpk
language:
C (gcc 8.3)
created:
1 day ago
visibility:
public

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