Learn C language from scratch day 025 (maze)

Bachelor degree, Department of Applied Chemistry, Zhengzhou University , Graduate student, physical chemistry, Fuzhou University , After two years of camp Education , Now, I take the postgraduate entrance examination to computer .

The original intention of writing this article is to supervise yourself to learn a certain amount of programming practice every day in this way , Although the results of the preliminary examination have not yet come out . But as long as there is a glimmer of hope, it should be a hundred times as hard to prepare for the retest , I hope I won't regret any result , And only by working hard will we not regret .

Today's learning summary ： Today's efficiency is higher , Code code time is also longer . Completed the two-dimensional array int and char Type learning . And I wrote the push box one day in advance , Very happy . I even felt a little bored tonight , Because I have been writing some functions in the textbook .

It's kind of boring , Is it true that programmers are all like this to have sex there . however , Have a rest , Listen to the music for a while , And decided to write something interesting , Write a maze , Then came the interest , Write as soon as you write 4 Hours .

With the deepening of learning , It is more and more difficult for the code I write to find errors based on the logic in my mind , I feel it especially today VS Of debug A powerful , Almost all the problems solved by the algorithm you think of have some errors that you can't find logical errors in your mind . All depend on VS Of debug The problem was found by monitoring variables step by step .

I found one when I was writing the tweet today bug, I try to count every move , But each count is calculated twice , Instead of imagining it step by step , Pass me debug The discovery could be getchar The problem of .

For example 36 OK, I input "d" Then press " enter ", In fact, the input is “d\0”, Two characters . Why? Maybe it's because if you use the following formula ：“for(int i=0;i<10;i++)a[i]=getchar();” There is no reading \0 The problem of . however debug The second cycle will directly skip the second 36 Yes getchar The process of , I can't think of the answer , Except for \0 I can't think of any other possibilities , Tried in the 34 In line for Add a "ch！=\0" Judgment statement of , I think it's ok if ch Indeed equal to \0 You can skip , But it still doesn't work , Let me more confused .

But after thinking about it, I changed my mind , That is, the second cycle did not wasd Such characters , Then I will compare the counter with the variable j Separate , Why do I have to use j Well ？ Just put it in wasd In the internal circulation of , So there is the first 42 That's ok , Sure enough, the problem was solved , Ha ha ha ha , Species debug The feeling of successfully bypassing the problem , Happy . The moment when the count is successfully displayed , I feel very satisfied . I feel like a loser .

Although it is also for this reason debug In the early morning , But instead, I have a feeling like a programmer —— All night debug. Maybe I have more experience .

I feel free to find some practical small programs , As a stage goal, writing is very interesting and fun . It can improve the sense of achievement , It can also be used as practicing skills , You can also learn some knowledge not mentioned in textbooks every time . The main purpose of my computer study is to write games , This also exactly meets my goal .

Considering that gobang is only an advanced version of the maze , So in three days , Write a Gobang to see , Take a UI Gobang interface , You can spend more time to make it look better . So time is ：2.15-17 To complete the task .

Today's code surprise ：

① This code for inputting the largest string made me understand return 0 The meaning of , I didn't understand why the main function should have return. Now it seems that it can be used to test whether it can be successfully implemented to the last step .

 ② One of the Valentine's Day gifts for Zhang , Ha ha ha , My painted heart may need anti aliasing .

③ I feel it again VS Of debug A powerful , I must blow another wave .

Today's code size ：

Today's doubt record ：

no

Tomorrow's learning outlook ：

①2.15-2.17 Write Gobang on the day , It is required to improve the perfection of this code as much as possible .

The maze code is here , I need to take it myself .

#include <stdio.h>
#include <windows.h>
main()
{
	int i=0,j=0;
	int x=1,y=1,t=10000;
	char ch;
	char maze[50][100]={
"***************************************************************",
"*0        **********                                          *",
"*  ****** ********   *************** ************************ *",
"* *******                    ******* **                   *** *", 
"* ************ ************* ******* *** **************** *** *",
"*                       **** ******* *** **************** *** *",
"* ************************** ******* *** **************** *** *",
"* ****                       ******* *** **************** *** *",
"*    * ***************************** *** ************     *** *",
"* **** ***************************** *** ************ ******* *",
"* **** ***************************** *** ************ ******* *",
"*    *                               *** ************ ******* *",
"*              ************************* ************ ******* *",
"******                                 * **                   *",
"* ************************************** **  ******************",
"*                                     ** ** *******************",
"* *********************************** ** **                   *",
"* ***********************************  * **********************",
"* **************************************                       ",	                    
"***************************************************************"};
	for(i=0;i<50;i++)
	    {
	        if(maze[i][0]!='\0')
			    puts(maze[i]);	
		}
	printf(" The remaining steps are =10000\n");
	for(j=0;j<10000;j++)
	{
		ch=getchar();    // Be careful here that each time you enter a direction, there is also a \0 The rest of , So I cycled twice  
		if(ch=='w'&&maze[x-1][y]==' ')
		{
			maze[x][y]=' ';
			maze[x-1][y]='0';
			x=x-1;
			t=t-1;
		}
		else if(ch=='a'&&maze[x][y-1]==' ')
		{
			maze[x][y]=' ';
			maze[x][y-1]='0';
			y=y-1;
			t=t-1;
		}
		else if(ch=='d'&&maze[x][y+1]==' ')
		{
			maze[x][y]=' ';
			maze[x][y+1]='0';
			y=y+1;
			t=t-1;
		}
		else if(ch=='s'&&maze[x+1][y]==' ')
		{
			maze[x][y]=' ';
			maze[x+1][y]='0';
			x=x+1;
			t=t-1;
		}
		system("cls");
		for(i=0;i<50;i++)
	    {
	        if(maze[i][0]!='\0')
			    puts(maze[i]);	
		}
	    printf(" The remaining steps are =%d\n",t);
		if(y==62&&x==18)
		{
			break;
		}
	}
	printf("\n\n\n\n*****************************\n");
	printf("\n\n\n\nYou are the winner!\n\n\n\n");
	printf("*****************************\n");
}