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  1.     #include <stdio.h>
  2.     #include <stdlib.h>
  3.     #include <string.h>
  4.     #include <time.h>
  5.  
  6.     void random(char list[][32], char *key, int size){
  7.         int i = rand()%size;
  8.         printf("choice %d\n",i);
  9.         printf("choice key is %s\n", list[i]);
  10.         strcpy(key, list[i]);
  11.     }
  12.  
  13.     int main(void){
  14.         char list[5][32], key1[32], word[32];
  15.         int count = 0;
  16.         srand(time(NULL));
  17.  
  18.         while(1){
  19.             printf("Enter word : ");
  20.             fgets(word, sizeof(word), stdin);
  21.             if(strcmp(word, "END\n")==0)
  22.                 break;
  23.             if(count < 5 && 1==sscanf(word, "VERTEX %s", key1)){
  24.                 strcpy(list[count++],key1);
  25.             }
  26.         }
  27.         random(list, key1, count);
  28.         printf("choice key : %s\n", key1);
  29.  
  30.         return 0;
  31.     }
  32.  
Success #stdin #stdout 0s 2012KB
comments (?)
stdin 
VERTEX No.1
VERTEX No.2
VERTEX No.3
VERTEX No.4
VERTEX No.5
END
stdout 
Enter word : Enter word : Enter word : Enter word : Enter word : Enter word : choice 3
choice key is No.4
choice key : No.4
https://ideone.com/qskZbZ
language:
C99 (gcc 8.3)
created:
10 years ago
visibility:
public

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