C language course design Tetris (Part 2)

  In this article, we will continue to look at the recurrence process of Tetris ：

Catalog

Determine if the game is over

  The subject of the game

  Read from file

  Update the highest score

Complete code

---

Determine if the game is over

Determine if the game is over , utilize for Cycle to judge the results of each time

// Determine if the game is over 
	for ( j = 1; j < COL - 1; j++)
	{
		if (face.data[1][j] == 1) // There are squares on the top （ By the end of 1 Behavior top level , Not the first 0 That's ok ）
		{
			Sleep(1000); // Leave players reaction time 
			system("cls"); // Clear the screen 
			color(7); // Color set to white 
			CursorJump(2 * (COL / 3), ROW / 2 - 3);
			if (grade>max)
			{
				printf(" Congratulations on breaking the record , The highest record was updated to %d", grade);
				WriteGrade();
			}
			else if (grade == max)
			{
				printf(" In line with the record , Come on, make another success ", grade);
			}
			else
			{
				printf(" Please continue refueling , There is a difference between the current record and the highest record %d", max - grade);
			}
			CursorJump(2 * (COL / 3), ROW / 2);
			printf("GAME OVER");
			while (1)
			{
				char ch;
				CursorJump(2 * (COL / 3), ROW / 2 + 3);
				printf(" Another round ?(y/n):");
				scanf("%c", &ch);
				if (ch == 'y' || ch == 'Y')
				{
					system("cls");
					main();
				}
				else if (ch == 'n' || ch == 'N')
				{
					CursorJump(2 * (COL / 3), ROW / 2 + 5);
					exit(0);
				}
				else
				{
					CursorJump(2 * (COL / 3), ROW / 2 + 4);
					printf(" Wrong choice , Please select... Again ");
				}
			}
		}
	}
	return 0; // The judgment is over , There is no need to call this function to judge 
}

  The subject of the game

In the main body of the game, it is mainly about the difficulty of the game , Game keys to write , You can also modify it in the code .

/ Game body logic function 
void StartGame()
{   
    int i,j;
	int shape = rand() % 7, form = rand() % 4; // Randomly obtain the shape and shape of the box 
	while (1)
	{
		int t = 0;
		int nextShape = rand() % 7, nextForm = rand() % 4; // Randomly obtain the shape and shape of the next box 
		int x = COL / 2 - 2, y = 0; // The abscissa and ordinate of the initial falling position of the block 
		color(nextShape); // The color is set to the color of the next box 
		DrawBlock(nextShape, nextForm, COL + 3, 3); // Display the next box in the upper right corner 
		while (1)
		{
			color(shape); // The color is set to the square currently falling 
			DrawBlock(shape, form, x, y); // Display the box at the initial drop position 
			if (t == 0)
			{
				t = 15000; // here t The smaller it is , The faster the box falls （ You can set the game difficulty according to this ）
			}
			while (--t)
			{
				if (kbhit() != 0) // If the keyboard is struck , Then exit the loop 
					break;
			}
			if (t == 0) // The keyboard is not tapped 
			{
				if (IsLegal(shape, form, x, y + 1) == 0) // It's illegal for the box to fall again （ Has reached the bottom ）
				{
					// Enter the information of the current box face among 
					//face: Record whether there are squares at each position of the interface , If there is a box, the color of the box at that position shall also be recorded .
					for ( i = 0; i < 4; i++)
					{
						for ( j = 0; j < 4; j++)
						{
							if (block[shape][form].space[i][j] == 1)
							{
								face.data[y + i][x + j] = 1; // Mark the position as square 
								face.color[y + i][x + j] = shape; // Record the color value of the box 
							}
						}
					}
					while (JudeFunc()); // Judge whether the falling of the box scores and whether the game is over 
					break; // Jump out of the current loop , Get ready to drop the next box 
				}
				else // Not to the bottom 
				{
					DrawSpace(shape, form, x, y); // Overwrite the position of the current square with a space 
					y++; // The ordinate increases automatically （ The next time the box is displayed, it's equivalent to falling a grid ）
				}
			}
			else // The keyboard is struck 
			{
				char ch = getch(); // Read keycode
				switch (ch)
				{
				case DOWN: // Direction key ： Next 
					if (IsLegal(shape, form, x, y + 1) == 1) // Judge whether the box is legal after moving down one bit 
					{
						// After the box falls, the following operations can be performed legally 
						DrawSpace(shape, form, x, y); // Overwrite the position of the current square with a space 
						y++; // The ordinate increases automatically （ The next time the box is displayed, it's equivalent to falling a grid ）
					}
					break;
				case LEFT: // Direction key ： Left 
					if (IsLegal(shape, form, x - 1, y) == 1) // Judge whether the box is legal after moving one bit to the left 
					{
						// The following operations can only be performed after the box is moved to the left 
						DrawSpace(shape, form, x, y); // Overwrite the position of the current square with a space 
						x--; // Abscissa self subtraction （ The next time the box is displayed, it is equivalent to moving one grid to the left ）
					}
					break;
				case RIGHT: // Direction key ： Right 
					if (IsLegal(shape, form, x + 1, y) == 1) // Judge whether the square is legal after moving one bit to the right 
					{
						// The following operations can only be performed after the box is moved to the right 
						DrawSpace(shape, form, x, y); // Overwrite the position of the current square with a space 
						x++; // Abscissa self increasing （ The next time the box is displayed, it's equivalent to moving one grid to the right ）
					}
					break;
				case SPACE: // Space bar 
					if (IsLegal(shape, (form + 1) % 4, x, y + 1) == 1) // Judge whether the box is legal after rotation 
					{
						// The following operations can only be performed after the square is rotated 
						DrawSpace(shape, form, x, y); // Overwrite the position of the current square with a space 
						y++; // The ordinate increases automatically （ You can't spin in place ）
						form = (form + 1) % 4; // The shape of the square increases （ The next time the box is displayed, it's equivalent to rotating ）
					}
					break;
				case ESC: //Esc key 
					system("cls"); // Clear the screen 
					color(7);
					CursorJump(COL, ROW / 2);
					printf("   Game over   ");
					CursorJump(COL, ROW / 2 + 2);
					exit(0); // End procedure 
				case 's':
				case 'S':  // Pause 
					system("pause>nul"); // Pause （ Press any key to continue ）
					break;
				case 'r':
				case 'R': // restart 
					system("cls"); // Clear the screen 
					main(); // Re execute the main function 
				}
			}
		}
		shape = nextShape, form = nextForm; // Get the information of the next box 
		DrawSpace(nextShape, nextForm, COL + 3, 3); // Overwrite the box information in the upper right corner with a space 
	}
}

  Read from file

/ Read the highest score from the file 
void ReadGrade()
{
	FILE* pf = fopen(" The highest score in Tetris .txt", "r"); // Open the file read-only 
	if (pf == NULL) // fail to open file 
	{
		pf = fopen(" The highest score in Tetris .txt", "w"); // Open the file in write only mode （ The file does not exist. You can create it automatically ）
		fwrite(&grade, sizeof(int), 1, pf); // take max write file （ here max by 0）, Initialize the highest historical score to 0
	}
	fseek(pf, 0, SEEK_SET); // Make the file pointer pf Point to the beginning of the file 
	fread(&max, sizeof(int), 1, pf); // Read the highest historical score in the file to max among 
	fclose(pf); // Close file 
	pf = NULL; // The file pointer is set to null in time 
}

  Update the highest score

// Update the highest score to the file 
void WriteGrade()
{
	FILE* pf = fopen(" The highest score in Tetris .txt", "w"); // Open the file in write only mode 
	if (pf == NULL) // fail to open file 
	{
		printf(" Failed to save the highest score record \n");
		exit(0);
	}
	fwrite(&grade, sizeof(int), 1, pf); // Write the game score of this game into the file （ Update the highest historical score ）
	fclose(pf); // Close file 
	pf = NULL; // The file pointer is set to null in time 
}

Reading the highest score from the file and updating the highest score do not affect the integrity of the program , It's mainly about the operation of documents, and I'm not too familiar , It's the partner who completes this part .

Complete code

Next is the complete code , These codes are indeed a little too many with comments , It is presented in the form of links .

http://t.csdn.cn/b3cxe

If you have any questions, please point them out . The next thing will be right opencv To study .