Table of contents
1. Java implementation
1. Content introduction
(1) After the program runs, we are reminded to enter a number. The guessed number is controlled between [0-100]. The following is the rendering:
(2) You can add some features yourself, such as controlling the number of guesses, or displaying a range of numbers every time you guess wrong.
2. Ideas
(1) Let the computer generate random numbers by itself
- How to write random numbers: Run the program once and only need to generate one
import java.util.Random;//需要包含的类包（类似C语言的头文件）
Random random = new Random();//需要工具，其中random是自己定义的工具名
int number =random.nextInt(100)+1;//number用来接收产生的随机数
//输入100则是控制范围为[0,100），我们再+1即是[0,100]- Enter the guessed number from the keyboard
import java.util.Scanner;//包含的类包
Scanner scanner = new Scanner(System.in);//工具，写在循环外- Within the loop, if you don’t guess it, you need to re-enter it.
System.out.print("请输入你要猜的数字：");
int input = scanner.nextInt();(2) There are three results for guessing numbers: guessing right, guessing small, and guessing big. One of them will be displayed every time you enter.
- Use the if else branch structure to control the direction of the results.
System.out.print("请输入你要猜的数字：");
int input = scanner.nextInt();
if(input<number) {
System.out.println("猜小了");
} else if(input>number) {
System.out.println("猜大了");
} else {
System.out.println("恭喜你猜对了");
break;
}(3) Control times
- Just add a variable to control the number of times
int times = 6;
while(times>0) {
System.out.print("请输入你要猜的数字：");
int input = scanner.nextInt();
if(input<number) {
times--;
System.out.println("猜小了,你的次数还剩"+times);
} else if(input>number) {
times--;
System.out.println("猜大了,你的次数还剩"+times);
} else {
System.out.println("恭喜你猜对了");
break;
}
}
if(times==0) {
System.out.println("傻瓜，没机会了，下辈子吧");
}3. Complete code
import java.util.Random;
import java.util.Scanner;
public class Game {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
//产生随机数
Random random = new Random();//工具
int number =random.nextInt(100)+1;
//只给6次机会
int times = 6;
while(times>0) {
System.out.print("请输入你要猜的数字：");
int input = scanner.nextInt();
if(input<number) {
times--;
System.out.println("猜小了,你的次数还剩"+times);
} else if(input>number) {
times--;
System.out.println("猜大了,你的次数还剩"+times);
} else {
System.out.println("恭喜你猜对了");
break;
}
}
if(times==0) {
System.out.println("傻瓜，没机会了，下辈子吧");
}
}
}2. C language implementation
1. Ideas
(1) Generate random numbers
- The rand() function generates pseudo-random numbers, that is, the numbers generated are the same every time it is run.
- Adding a timestamp: srand((unsigned int)time(NULL)) can control the number generated each time it is run to be different.
srand((unsigned int)time(NULL));
int number = rand()%100+1;- Header files that need to be included
#include<time.h>//time函数
#include<stdlib.h>//rand函数(2) Branch structure
- It also needs to be divided into three results, guess right, guess small and guess big.
while (1)
{
printf("请输入你要猜的数字:");
scanf("%d", &input);
if (input > number) {
printf("猜大了\n");
}
else if (input < number) {
printf("猜小了\n");
}
else {
printf("猜对了:%d\n",input);
break;
}(3) Color addition
- You can set the number of guessing games
int count = 6;
while (count)
{
printf("请输入你要猜的数字:");
scanf("%d", &input);
if (input > number) {
count--;
printf("猜大了,还剩%d次\n",count);
}
else if (input < number) {
count--;
printf("猜小了,还剩%d次\n",count);
}
else {
printf("猜对了:%d\n",input);
break;
}
}
- Simple menu can be set up
void menu()
{
printf("*******************\n");
printf("****** 1.play *****\n");
printf("****** 0.eixt *****\n");
printf("*******************\n");
}
int input = 0;
menu();
printf("输入你的选择：");
scanf("%d", &input);2. Complete code
#define _CRT_SECURE_NO_WARNINGS 1
#include<stdio.h>
#include<time.h>
#include<stdlib.h>
void menu()
{
printf("*******************\n");
printf("****** 1.play *****\n");
printf("****** 0.eixt *****\n");
printf("*******************\n");
}
int main() {
int input = 0;
srand((unsigned int)time(NULL));
int number = rand() % 100 + 1;
menu();
printf("输入你的选择：");
scanf("%d", &input);
while(input){
int count = 6;
while (count)
{
printf("请输入你要猜的数字:");
scanf("%d", &input);
if (input > number) {
count--;
printf("猜大了,还剩%d次\n", count);
}
else if (input < number) {
count--;
printf("猜小了,还剩%d次\n", count);
}
else {
printf("猜对了:%d\n", input);
break;
}
}
}
return 0;
}
3. Summary
1. Generate random numbers
(1) Generating random numbers in C language requires two steps:
- Need to set the timestamp: srand((unsigned int)time(NULL));
- Use a function to generate random numbers: int number = rand() % 100 + 1;
(2) Java requires two steps to generate random numbers:
- Using the toolkit: Random random = new Random();
- Use method to generate random numbers: int number =random.nextInt(100)+1;
2. Branch structure
- In the implementation process of C language and Java, the writing methods of the three directions are very similar, so the ideas between them are similar.
- In addition, you can add some interesting code yourself to make it richer