#include <stdio.h>
#include <stdlib.h>
 
int myStrlen(char s[]){
    int i;
    for(i=0;s[i]!='\0';i++);
    return i;
}
 
// 関数の中でtmpに対してmallocして
// そこに回文を代入してreturnで返しましょう
char *setPalindrome(char s[]){
	char *tmp;
	//以下に必要な宣言を含めて書いてください
	int i, j, n;
	n = myStrlen(s);
	tmp = (char *)malloc(sizeof(char)*(n * 2) + 1);
    if(tmp == NULL){
        printf("ERROR\n");
        return 0;
    }
 
    for(i = 0; i < n; i++){
    	tmp[i] = s[i];
    }
    for(i = n, j = n - 1; i < n * 2; i++, j--){
    	tmp[i] = s[j];
    }
	tmp[n * 2] = '\0';
	return tmp;
}
 
 
//メイン関数はいじる必要はありません
int main(){
    //int i;
    char nyuryoku[1024]; //入力
    char *kaibun;   //回文を受け取る
    scanf("%s",nyuryoku);
    kaibun = setPalindrome(nyuryoku);
    printf("%s\n  -> %s\n",nyuryoku,kaibun);
    free(kaibun);
    return 0;
}
 

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

Z29vZ2xl

google