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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;
  13.     char *tmp;
  14.  
  15.     tmp=(char*)malloc(sizeof(char)*(len*2+1));
  16.     if(tmp == NULL){
  17.         printf("エラー\n");
  18.         exit(1);
  19.     }
  20.  
  21.     for(i=0;i<len;i++){
  22.         tmp[i]=s[i];
  23.     }
  24.  
  25.     for(i=0;i<len;i++){
  26.         tmp[len+i]=s[len-1-i];
  27.     }
  28.  
  29.     tmp[len*2]='\0';
  30.  
  31.     return tmp;
  32. }
  33.  
  34. int main(){
  35.     int i;
  36.     char nyuryoku[1024];
  37.     char *kaibun;
  38.  
  39.     scanf("%s", nyuryoku);
  40.     kaibun=setPalindrome(nyuryoku);
  41.  
  42.     printf("%s\n  -> %s\n", nyuryoku, kaibun);
  43.  
  44.     free(kaibun);
  45.     return 0;
  46. }
Success #stdin #stdout 0.01s 5292KB
comments (?)
stdin 
abcd
stdout 
abcd
  -> abcddcba
https://ideone.com/G2XvnY
language:
C (gcc 8.3)
created:
2 days ago
visibility:
public

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