C language, a number guessing game

1.C The language realizes the guessing number game ：

#define _CRT_SECURE_NO_WARNINGS

// Guess the number game ：
// 1. A random number is automatically generated by the computer 
// 2. Guess the number 

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

void game()
{
    
	//1. Generating random numbers 
	int ret = 0;
	int guess = 0;
	ret = rand() % 100 + 1;// Generate 1--100 Random number between 
	//2. Guess the number 
	while (1)
	{
    
		printf(" Please guess a number ：");
		scanf("%d",&guess);
		if (guess > ret)
		{
    
			printf(" Guess the \n");
		}
		else if (guess < ret)
		{
    
			printf(" Guess a little \n");
		}
		else
		{
    
			printf(" That's right ！\n");
			break;
		}
	}
}

void menu()
{
    
	printf("-----------------------------------\n");
	printf("---------1.play 0.exit----------\n");
	printf("-----------------------------------\n");
}

int main()
{
    
	int input = 0;
	//  Use time stamp to set the starting point of random number generation 
	// Time stamp ： Current computer time - Computer start time （ namely 1970 year 1 month 1 Japan 0 when 0 branch 0 second ）
	srand((unsigned int)time(NULL));//seed rand
	do
	{
    
		menu();
		printf(" Please select ：");
		scanf("%d", &input);
		switch (input)
		{
    
		case 1:
			game();
			break;
		case 0:
			printf(" Quit the game \n");
			break;
		default:
			printf(" Wrong choice , Please re-enter \n");
			break;
		}
	} while (input);// Not 0 It's true , Start the cycle ;0 For false , End of cycle 
	return 0;
}

2.python Realize the number guessing game ：

import random

guess = random.randint(1,10)

#  Number of guesses 
i = 1

while True:
    print(" The first %d Second guess , Please enter a number "%(i))
    
    try:
        temp=int(input())
        i+=1
    except ValueError:
            print(" The input is invalid ")
            continue
            
    if temp == guess:
        print(" Congratulations , Guessed it ")
        break
    elif temp < guess:
        print(" Guess a little ")
    elif temp >guess:
        print(" Guess the ")
        

thus it can be seen ,Python Easier

#include <stdio.h>

//1. Calculation 1/1-1/2+1/3-1/4.......+1/99-1/100 Value , And print it out 
int main()
{
    
	int i = 0;
	//int sum = 0;
	double sum = 0.0;
	int flag = 1;
	for (i = 1; i <= 100; i++)
	{
    
		sum += flag * 1.0 / i;
		flag = -flag;
	}
	printf("%lf\n", sum);
	return 0;
}

//2. Find the maximum of ten numbers MAX
int main()
{
    
	int arr[] = {
     21, 42, 8, 19, 30, 97, 12, 25, 68, 85 };
	int max = arr[0];// Be careful ： It can't be written here 0, Because it's possible that all ten numbers are negative , be 0 Is the maximum number Max
	int i = 0;
	int size = sizeof(arr) / sizeof(arr[0]);// Calculation array How many numbers are there in the 
	for (i = 1; i < size; i++)
	{
    
		if (arr[i]>max)
		{
    
			max = arr[i];
		}
	}
	printf("mmax = %d\n", max);
	return 0;
}

//3. Output 99 multiplication table formula on the screen 
int main()
{
    
	int i = 0;
	for (i = 1; i <= 9; i++)
	{
    
		int j = 1;
		for (j = 1; j <= i; j++)
		{
    
			printf("%d*%d=%-2d ", i, j, i*j);//"-" Indicates left alignment , A positive number means right aligned ,2d Indicates that a number occupies two lattices 
		}
		printf("\n");
	}
	return 0;
}