Phone Balance Simulation Program

Note:

In fact, this program is very simple. It only uses some basic syntax knowledge and simple logical relationships. Next I will explain the functions implemented by this program.

1. The program reads the account balance of each user from the specified file and saves it in the array of user;

2. manually enter the time when the user calls the phone. The default value is 1 RMB per minute;

3. The program displays the I-th user account balance and determines whether to continue calling.

Code:

 1 // &author: Stone 2 // time: 2013/5/16 3 #include <stdio.h> 4 #define MAX 10 // Define the max users 5  6 int main () 7 { 8     int user[MAX]; // define users to int 9     FILE* fp; // define file10     fp = fopen("user information.txt", "r"); // open file11     int i;12     for (i = 0; i < MAX; ++i)13     {14         fscanf(fp, "%d", &user[i]); // input data from the file15     }16 17     while (1)18     {19         printf("Please enter how long did it take to which user.\nFORMAT:2 12min\n");20         int user_i, time;21         scanf("%d %dmin", &user_i, &time);22         if (!user_i) // Exit criteria23         {24             break;25         }26 27         if (user[user_i - 1] == 0) // overdue bills28         {29             printf("Sorry, you have no current available balance of account.\nAnd can continue to use after prepaid phone.\n\n");30         }31         else if (user[user_i - 1] < 0) // overdue bills32         {33             int own = 0 - user[user_i - 1];34             printf("Sorry, your account is now overdue bills of ￥%d.\nAnd can continue to use after prepaid phone.\n\n", own);35         }36         else37         {38             user[user_i - 1] -= time; // The ith user to computing time39             if (user[user_i - 1] >= 0) // no overdue bills40                 printf("User %d remaining %d minutes.\n\n", user_i, user[user_i - 1]);41             else // overdue bills42                 printf("I'm sorry, you have overdue bills.\n\n");43         }44     }45 46     fclose(fp); // close file47     return 0;48 }

User information.txt

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Because it is a bit of self-thinking, it is divided into the "New Thinking" category...