[C language] number guessing game + shutdown applet

Preface

Today, I write guessing number games and shutdown applet , You can also have fun while studying , Learning and entertainment are the same , Let's experience the happiness of writing games ！

1. Guess number games

Let the computer generate 1~100 The random number , Then guess the number , Guess the number must be bigger , Guess a little . Guess big return guess big , Guess small, then return to guess small , Until you guessed right , Guess right and end the game . After playing the number guessing game, we don't feel satisfied. We need to do it again , We're going to use a loop .

（1） generate menu

At the beginning of the game, we have to print the menu , So we use do while Cycle print menu , Pack a simple menu function

void menu()
{
    
	printf("*******************************\n");
	printf("******** 1.play *******\n");// choose 1 Enter the game 
	printf("******** 0.exit *******\n");// choose 0 Quit the game 
	printf("*******************************\n");
}

（2） Whether to enter the game

Follow the menu prompts , Do we play games , You have to enter a number to judge whether the player enters the game , So let's define a variable input, We use switch and case Statement to select , choice 1 Just enter the game and guess the number ; choice 0 Then quit the game ; If you choose other, you will be prompted with the wrong choice , To choose ！

int main()
{
    
	int input = 0;
	do
	{
    
		menu();
		printf(" Please select ：>");
		scanf("%d", &input);
		switch (input)
		{
    
		case 1:
			printf(" Guess the number \n");
			break;
		case 0:
			printf(" Quit the game \n");
			break;
		default:
			printf(" Wrong choice , To choose ！\n");
			break;
		}
	} while (input);// The circulation condition here is also input, Input 0, It will exit the loop directly 
	return 0;
}

（3） Guess the number game()

• Generate random number

Players play games , We have to let the computer randomly generate some numbers , Let the players guess , We used rand function , Let's see rand Use of functions ：

stay rand The use of functions is mentioned , call rand Before the function, you need to call sand function To set up our random generator ,sand The use of the function is shown in the figure below ：

We want random numbers , The computer will generate different random numbers , We need to pass a value here , This value is time , Time changes every minute and every second , Here we introduce a timestamp

Be careful : We don't generate random numbers once, the game only needs to be generated once, so we will srand() Function in our main function

void game()
{
    
	srand((unsigned int)time(NULL));
	//1. Generate random number 
	int ret = rand()%100+1;// Generate 0~100 The random number 
}

• Players guess numbers

Let's write a loop , Guess big return guess big , Guess small return guess small , Until you guessed right

void game()
{
    
	int guess = 0;
	//1. Generate random number 
	int ret = rand()%100+1;// Generate 0~100 The random number 
	//2. Guess the number 
	while (1)
	{
    
		printf(" Please guess the number :>");
		scanf("%d", &guess);
		if (guess > ret)
		{
    
			printf(" Guess the \n");
		}
		else if (guess < ret)
		{
    
			printf(" Guess a little \n");
		}
		else
		{
    
			printf(" congratulations , Guessed it \n");
			break;
		}
	}
}

（4） The whole game complete code

#include <stdio.h>
#include <stdlib.h>
#include <time.h>
void menu()
{
    
	printf("*******************************\n");
	printf("******** 1.play *******\n");// choose 1 Enter the game 
	printf("******** 0.exit *******\n");// choose 0 Quit the game 
	printf("*******************************\n");
}
void game()
{
    
	int guess = 0;
	//1. Generate random number 
	int ret = rand()%100+1;// Generate 0~100 The random number 
	//2. Guess the number 
	while (1)
	{
    
		printf(" Please guess the number :>");
		scanf("%d", &guess);
		if (guess > ret)
		{
    
			printf(" Guess the \n");
		}
		else if (guess < ret)
		{
    
			printf(" Guess a little \n");
		}
		else
		{
    
			printf(" congratulations , Guessed it \n");
			break;
		}
	}
}

int main()
{
    
	srand((unsigned int)time(NULL));
	int input = 0;
	do
	{
    
		menu();
		printf(" Please select ：>");
		scanf("%d", &input);
		switch (input)
		{
    
		case 1:
			game();// Guess the whole logic of numbers 
			break;
		case 0:
			printf(" Quit the game \n");
			break;
		default:
			printf(" Wrong choice , To choose ！\n");
			break;
		}
	} while (input);
	return 0;
}

Play a game ！

2. Shut down the applet

Here is a hint that the shutdown applet is purely entertainment , You can also spoof ！

Write a shutdown program , Just run , The computer is 1 Shut down in minutes , If input ： I am a pig , To cancel shutdown .

We need to call the system command here shutdown -s -t 60 （-t Indicates setting the time to shut down ,60 Express 60 second ）, The system cancel shutdown command is shutdown -a

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
int main()
{
    
	char input[20] = {
     0 };
	system("shutdown -s -t 60");
again:
	printf(" Please note that , Your computer is 1 Shut down in minutes , If I'm a pig , Just cancel the shutdown \n");
	scanf("%s", input);
	if (strcmp(input, " I am a pig ") == 0)
	{
    
		system("shutdown -a");
		printf(" Shutdown cancelled \n");
	}
	else
	{
    
		goto again;
	}
	return 0;
}

This chapter ends here , If there is anything bad written , Please correct me. .
If you think it's good and helpful to you, please give support to the third company ！
Fighting!!!