小白学习c语言第一天：打字母游戏

#include<stdio.h>
#include<stdbool.h>
#include<Windows.h>

int levels = 0, scores = 0, lines = 0, num = 0, col = 0;

void entry_space(int num)
{
	for (int i = 0; i < num; i++) 
	{
		printf(" ");
	}
}

void entry_line(int num)
{
	for (int i = 0; i < num; i++)
	{
		printf("\r\n");
	}
}

void welcome(void) {
	entry_line(13);
	entry_space(40);

	printf("press anykey to start");
	getchar();	//阻塞作用
	system("cls");  //调用系统cls指令，清屏！
}

void makehead(void) {
	system("cls");
	num = rand() % 26;
	entry_space(20);
	printf("levels:%d", levels);
	entry_space(10);
	printf("scores:%d\r\n", scores);

	entry_space(20);
	printf("1--pause");
	entry_space(10);
	printf("0--Exit\t\n");

	for (int i = 0; i < 80; i++)
	{
		printf("_");
	}
	entry_line(1);
}

void gameplay(void){
	col = rand() % 80;
	while (true)
	{
		lines++;
		if (lines > 25)
		{
			lines = 0;
			scores -= 10;
			if (scores == -50)
			{
				system("cls");
				entry_line(13);
				entry_space(40);
				printf("failed!");
				getch();
				exit(0); //结束程序。
			}
			break;
		}

		entry_space(col);
		printf("%c", 'a' + num);
		Sleep(100);
		printf("\b \n");
		if (kbhit())
		{
			char c = getch();
			if (c == 'a' + num)
			{
				scores += 10;
				lines = 0;
				break;
			}
			else if (c == '0') {
				
				system("cls");
				entry_line(13);
				entry_space(40);
				printf("您的得分是:%d分", scores);
				getch();
				exit(0);
			}
			else if (c == '1') 
			{
				system("cls");
				entry_line(13);
				entry_space(35);
				printf("暂停中……任意键继续哦！");
				getchar();
				system("cls");
				lines = 0;
				makehead();
				
			}

		}
	}
}

int main()
{	
	welcome();

	while (true)
	{
		makehead();
		
		gameplay();
		
	}

	return 0;
}