本文主要讲解如何通过C语言来修改dos背景和前景颜色，我们首先来看一下dos的背景颜色的属性。
- 打开开始菜单，点击运行，弹出运行对话框，输入cmd，回车。（打开dos控制台）
- 在命令提示符界面下，输入help color，弹出下图所示的提示信息。
3. 源程序如下：
#include<time.h>
#include<stdlib.h>
#include<stdio.h>
#include<windows.h>
int main()
{
while (1)
{
srand(time(NULL));
int _nPreColorFlag = rand() % 10;
int _nBackColorFlag = rand() % 6;
char _cBackColorFlag;
switch(_nBackColorFlag)
{
case 0: _cBackColorFlag = 'A';
break;
case 1: _cBackColorFlag = 'B';
break;
case 2: _cBackColorFlag = 'C';
break;
case 3: _cBackColorFlag = 'D';
break;
case 4: _cBackColorFlag = 'E';
break;
case 5: _cBackColorFlag = 'F';
break;
}
char strColorFormat[2];
sprintf(strColorFormat,"color %d%c",_nPreColorFlag,_cBackColorFlag);
system(strColorFormat); //通过system函数来设置背景颜色
printf("Console Application\n");
Sleep(1000); //程序睡眠1秒
system("cls"); //清空屏幕
}
return 0;
}
程序运行效果截图：
提示：程序中出现的函数以及对应的头文件
函数：rand()
rand
Generates a pseudorandom number.
int rand( void );
| Routine | Required Header | Compatibility |
| rand | <stdlib.h> | ANSI, Win 95, Win NT |
函数:system()
system, _wsystem
Execute a command.
int system( const char *command);
int _wsystem( const wchar_t *command);
| Routine | Required Header | Compatibility |
| system | <process.h> or <stdlib.h> | ANSI, Win 95, Win NT |
| _wsystem | <process.h> or <stdlib.h> or <wchar.h> | Win NT |
函数：Sleep()
The Sleep function suspends the execution of the current thread for a specified interval.
VOID Sleep(
DWORD dwMilliseconds // sleep time in milliseconds
);
Parameters
dwMilliseconds
- Specifies the time, in milliseconds, for which to suspend execution. A value of zero causes the thread to relinquish the remainder of its time slice to any other thread of equal priority that is ready to run. If there are no other threads of equal priority ready to run, the function returns immediately, and the thread continues execution. A value of INFINITE causes an infinite delay.