Complete the number guessing game//C language guessing number game (detailed explanation of the writing process)

	int i, j, k;
	int num = 0;

	/* Generate random numbers */
	num = rand ();
	printf("%d\n", num);

Choose to play the game or quit

void play(int x)
{
	printf("%d\n", x);
	printf("Start the game");
}
scanf("%d", &k);

	switch (k)
	{
	case 1:
		play(num);
		
	case 2:
		break;
	}

loop game program

void play(int x)
{
	printf("%d\n", x);
	printf("Start the game");




	printf("Game over");
}
intmain()
{
	int i, j, k;
	int num = 0;

	/* Generate random numbers */
	num = rand ();
	printf("%d\n", num);
	
again:
	{
		scanf("%d", &k);
		switch (k)
		{
		case 1:
			play(num);
			goto again;
		case 2:
			break;
		}
	}
	

Write and play the internal program of the game

void play(int x)
{
	int number=0;
	printf("Please enter a number\n");
	
again_1:
	{
		scanf("%d", &number);
		while (number != x)
		{
			if (number > x)
			{
				printf("Big"); goto again_1;
			}
			else
			{
				printf("Small"); goto again_1;
			}
				
		}printf("Right\nPlease select\n\n");
	}
}

At this point, the overall framework of the game has been compiled and can run normally. But we found that every time the number is 41 (or other fixed number)

/*
*** Guess the number game
*/


void play(int x)
{
	int number=0;
	printf("Please enter a number\n");
	
again_1:
	{
		scanf("%d", &number);
		while (number != x)
		{
			if (number > x)
			{
				printf("Big"); goto again_1;
			}
			else
			{
				printf("Small"); goto again_1;
			}
				
		}printf("Right\nPlease select\n\n");
	}
}


intmain()
{
	int i, j, k;
	int num = 0;


	/* Generate random numbers */
	num = rand ();


again:
	{
		printf("Start game\n1.Start\n2.Exit\n");
		scanf("%d", &k);
		switch (k)
		{
		case 1:
			play(num);
			goto again;
		case 2:
			break;
		}
	}




	system("pause");
	return 0;
}

About the <time.h> header file

generate random numbers

	/* Generate random numbers */
	// num = rand ();
	srand(time(NULL));
	num = rand ()% 100

final program

#define _CRT_SECURE_NO_WARNINGS 1
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
/*
*** Guess the number game
*/

void play(int x)
{
	int number=0;
	printf("Please enter a number\n");
	
again_1:
	{
		scanf("%d", &number);
		while (number != x)
		{
			if (number > x)
			{
				printf("Big\n"); goto again_1;
			}
			else
			{
				printf("Small\n"); goto again_1;
			}
				
		}printf("\n***Right***\n *********\n   ******\n   ****\n    **\n");
	}
}

intmain()
{
	int k;
	int num = 0;

	/* Generate random numbers */
	// num = rand ();
	srand(time(NULL));
	num = rand ()% 100;

	

again:
	{
		printf("Start game\n1.Start\n2.Exit\n");
		scanf("%d", &k);
		switch (k)
		{
		case 1:
			play(num);
			goto again;
		case 2:
			break;
		}
	}


	system("pause");
	return 0;
}

Detailed introduction to the analysis of randomly generated numbers

https://mp.csdn.net/postedit/79788815