C language implementation of guessing numbers Games project practice (based on srand function, rand function, switch statement, while loop, if condition criterion, etc.)

C Language implementation guessing numbers game project practice ( be based on srand function 、rand function ,Switch sentence 、while loop 、if Condition criteria, etc )

One 、 Guess the requirements of the number game

Guessing numbers is a classic game we liked when we were young , In this paper , The main functions of the guessing numbers game are as follows
1. Log in to guess the number game system , Display the hour welcome interface .
2. The numbers guessed by users are systematically and randomly 1-20 Between generation .
3. Users can have 5 Guess this randomly generated number for one time .
4. If the user guesses big , The system will display guess big , And prompt how many chances there are to guess the number .
5. if 5 I didn't guess the number randomly generated by the system twice , Then the game is over .

Two 、 Guess the process of realizing the number game

2.1 Project creation

Use VS2019 Create a file called GuessNumber Of C Language project , And in GuessNumber Create... In the project Main.c Source files and Main.h The header file .

2.2 Content of header file

stay Main.h Header file , Include relevant header files , As shown below

#include <stdio.h>
#include <stdlib.h>
#include <time.h>

In declaring two functions , As shown below

//  Show menu 
void menu();

//  Guess the number game function 
void gameGuess();

among ,menu The function of the function is to display the initialization interface of the guessing number game , And provide relevant instructions for guessing numbers games .gameGuess The function of the function is the core of the whole number guessing game , stay gameGuess It mainly realizes the function of users guessing numbers , And provide users with friendly prompt function .

2.3 Source file content

First, include the header file

#define _CRT_SECURE_NO_WARNINGS

#include "Main.h"

among #define _CRT_SECURE_NO_WARNINGS To make the compiler have no warnings .

main Add the following code to the function

	system("color 3E");

	int select = 0;

	// Prevent random numbers from appearing 
	srand((unsigned int)time(NULL));

	// Using the loop implementation, you can play many times 
	do
	{
    
		menu();

		printf(" Please enter the option ：");
		scanf("%d", &select);

		switch (select)
		{
    
		case 1:
			gameGuess();
			break;
		case 0:
			break;
		default:
			printf(" Wrong choice \n");
			system("pause");
			system("cls");
			break;
		}

	} while (select);

	printf(" Welcome to use next time , bye ！！！\n");

	system("pause");
	return 0;

First define select Variable , According to the value entered by the user , To the variable select assignment , So as to enter the corresponding function , And then realize the relevant functions .
srand To prevent random numbers from appearing .
According to the input select value , Get into switch Branch statements to judge .

menu Function as follows

//  Show menu 
void menu()
{
    
	printf("**********************************************************\n");
	printf("*  Welcome to the number guessing game \n");
	printf("*  Rule description \n");
	printf("*  Guess the number is 1-20\n");
	printf("*  share 5 Second chance \n");
	printf("*  Welcome to guess the number ！！！\n\n");

	printf("* 1. Start the game \n");
	printf("* 0. Quit the game \n");
	printf("**********************************************************\n\n");
}

Its main function is to display the menu function of the system , Prompt the user to guess how the number game should be played .

gameGuess Function as follows

// Guess the number game function 
void gameGuess()
{
    
	int num = 0, input = 0, count = 0;

	num = rand() % 20 + 1;// obtain 1-100 A random number of 

	while (count != 5)// utilize if Circular judgement 
	{
    
		printf(" Please enter a number ：");
		scanf("%d", &input);

		if (input == num)
		{
    
			printf(" Congratulations! , Your guess is right ！！！\n");
			break;
		}
		else if (input < num)
		{
    
			printf(" You guess it's small \n");
		}
		else
		{
    
			printf(" You guessed big \n");
		}

		count++;
		if (count == 5)
		{
    
			printf(" unfortunately ,5 The first chance is used up , You're not right ！！！\n\n");
			printf(" The right answer is ：%d\n", num);
			break;
		}
		printf(" Do you have ：%d Second chance \n\n", 5 - count);
	}

	system("pause");
	system("cls");
}

Use system library functions rand Randomly generate one 1-20 The number of , Assign a value to a variable num , Then according to the input variables input Whether the values are equal is used == Judge .
count It is mainly used to judge how many chances the user has to guess the number .

3、 ... and 、 Guess the debugging results of the number game are as follows

1. Entry system , Input number 1

2. Guess the correct debugging result

3. There is no debugging result guessed correctly

Four 、 Based on the summary of guessing numbers games

The guessing numbers game in this article makes us understand C The introduction of language can be effectively improved , about srand function 、rand function ,Switch sentence 、while loop 、if Condition criteria, etc C Language knowledge points can be further mastered .

5、 ... and 、 Complete code

Main.h The header file

#pragma once

#include <stdio.h>
#include <stdlib.h>
#include <time.h>

//  Show menu 
void menu();

//  Guess the number game function 
void gameGuess();

Main.c Source file

#define _CRT_SECURE_NO_WARNINGS

#include "Main.h"

int main()
{
    
	system("color 3E");

	int select = 0;

	// Prevent random numbers from appearing 
	srand((unsigned int)time(NULL));

	// Using the loop implementation, you can play many times 
	do
	{
    
		menu();

		printf(" Please enter the option ：");
		scanf("%d", &select);

		switch (select)
		{
    
		case 1:
			gameGuess();
			break;
		case 0:
			break;
		default:
			printf(" Wrong choice \n");
			system("pause");
			system("cls");
			break;
		}

	} while (select);

	printf(" Welcome to use next time , bye ！！！\n");

	system("pause");
	return 0;
}

//  Show menu 
void menu()
{
    
	printf("**********************************************************\n");
	printf("*  Welcome to the number guessing game \n");
	printf("*  Rule description \n");
	printf("*  Guess the number is 1-20\n");
	printf("*  share 5 Second chance \n");
	printf("*  Welcome to guess the number ！！！\n\n");

	printf("* 1. Start the game \n");
	printf("* 0. Quit the game \n");
	printf("**********************************************************\n\n");
}

// Guess the number game function 
void gameGuess()
{
    
	int num = 0, input = 0, count = 0;

	num = rand() % 20 + 1;// obtain 1-100 A random number of 

	while (count != 5)// utilize if Circular judgement 
	{
    
		printf(" Please enter a number ：");
		scanf("%d", &input);

		if (input == num)
		{
    
			printf(" Congratulations! , Your guess is right ！！！\n");
			break;
		}
		else if (input < num)
		{
    
			printf(" You guess it's small \n");
		}
		else
		{
    
			printf(" You guessed big \n");
		}

		count++;
		if (count == 5)
		{
    
			printf(" unfortunately ,5 The first chance is used up , You're not right ！！！\n\n");
			printf(" The right answer is ：%d\n", num);
			break;
		}
		printf(" Do you have ：%d Second chance \n\n", 5 - count);
	}

	system("pause");
	system("cls");
}