struct 練習

題目:
Reads a file (input.txt) which contains several player data, including ID, Name, Age and Score.
Parse these data into struct with the format shown below.

struct

{

  id (integer number)

  name (string)

  age (integer number)

  score (floating number)

}

Reads another file (cmd.txt) which contains several numbers, iterate through each number and show the player data if the ID matched the number; otherwise print “Player data not found.” as the output.

範例輸入:

(Input File: input.txt)

3

12,Samina Hubbard,22,852.4

2,Idris Lindsey,30,1234.5

21,Briony Mullins,37,2123.5

(Command File: cmd.txt)

12

21

0

2

3

範例輸出:

程式碼:

#include <stdio.h>
#include <string.h>
#include "FileHandler.h"
int main()
{
 int n = 0, i_now = 0;
 char *str = readAllTextFromFile("./input.txt");

 while (str[i_now] != '\n') //read case number
 {

  n = (str[i_now] - '0') + n * 10;
  i_now++;
 }
 i_now++; //skip new line
 struct data
 {
  int id;
  char name[50];
  int age;
  char score[50];
 };
 struct data player[100];
 for (int i = 0; i < n; i++) //read player data
 {
  for (int j = 0; j < 50; j++)
   player[i].name[j] = NULL;
  for (int j = 0; j < 50; j++)
   player[i].score[j] = NULL;
  int id = 0, len1 = 0, age = 0, len2 = 0;
  while (str[i_now] != ',')
  {
   id = id * 10 + str[i_now] - '0';
   i_now++;
  }
  player[i].id = id;
  i_now++;
  while (str[i_now] != ',')
  {
   player[i].name[len1] = str[i_now];
   i_now++;
   len1++;
  }
  i_now++;
  while (str[i_now] != ',')
  {
   age = age * 10 + str[i_now] - '0';
   i_now++;
  }
  player[i].age = age;
  i_now++;
  while (str[i_now] != '\n')
  {
   player[i].score[len2] = str[i_now];
   i_now++;
   len2++;
  }
  i_now++;
  if (str[i_now] == NULL)
   break;
 }

 str = readAllTextFromFile("./cmd.txt");
 i_now = 0;
 while (str[i_now]!=NULL)
 {
  int num = 0, check = 0;
  while (str[i_now] != '\n'&&str[i_now]!=NULL)
  {
   num = num * 10 + str[i_now] - '0';
   i_now++;
  }
  i_now++;
  for (int i = 0; i < n; i++)
  {
   if (player[i].id == num)
   {
    printf("ID: %d\n", player[i].id);
    printf("Name: %s\n", player[i].name);
    printf("Age: %d\n", player[i].age);
    printf("Score: %s\n\n", player[i].score);
    check = 1;
    break;
   }
  }
  if (check == 0)
   printf("Player not found\n\n");
  if (str[i_now]==NULL)
   break;

 }

 system("pause");
 return 0;
}