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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.     int len = myStrlen(s);
  12.     int i, total_len;
  13.     char *tmp;
  14.  
  15.     total_len = 2 * len;
  16.     tmp = (char *)malloc((total_len + 1) * sizeof(char));
  17.     if (tmp == NULL) {
  18.         printf("ERROR\n");
  19.         exit(1);
  20.     }
  21.  
  22.     for (i = 0; i < len; i++) {
  23.         tmp[i] = s[i];
  24.     }
  25.  
  26.     for (i = 0; i < len; i++) {
  27.         tmp[len + i] = s[len - i - 1];
  28.     }
  29.  
  30.     tmp[total_len] = '\0';
  31.  
  32.     return tmp;
  33. }
  34.  
  35. int main() {
  36.     int i;
  37.     char nyuryoku[1024];
  38.     char *kaibun;
  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 0s 5280KB
comments (?)
stdin
copy 
abcd
stdout
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abcd
  -> abcddcba
https://ideone.com/7LiQTN
課題2
language:
C (gcc 8.3)
created:
5 days ago
visibility:
public

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