linux getch()

#include

#include

int mygetch(void)

{

struct termios oldt,

newt;

int ch;

tcgetattr( STDIN_FILENO, &oldt );

newt = oldt;

newt.c_lflag &= ~( ICANON | ECHO );

tcsetattr( STDIN_FILENO, TCSANOW, &newt );

ch = getchar();

tcsetattr( STDIN_FILENO, TCSANOW, &oldt );

return ch;

}

//此getch不回显，只要有按键按下马上返回按键的ACSII码。没按键按下则等待。

scanf():不会读取键盘缓冲区的空格、制表符，换行符和退格符。也就是说scanf()碰到这个字符就会返回。

gets() :读取键盘缓冲区一字符串，以0x0A结尾。

getchar:读取键盘缓冲区一个字符，只要键盘缓冲区有，包括空格、制表符，换行符和退格符.

///////////////////////////////////测试代码////////////////////////////////////////////

/*CharTest.c*/

#include

#include

#include

#include

int mygetch(void)

{

struct termios oldt,

newt;

int ch;

tcgetattr( STDIN_FILENO, &oldt );

newt = oldt;

newt.c_lflag &= ~( ICANON | ECHO );

tcsetattr( STDIN_FILENO, TCSANOW, &newt );

ch = getchar();

tcsetattr( STDIN_FILENO, TCSANOW, &oldt );

return ch;

}

main()

{

    char ch1[10],ch2[10];

    char buf[100];

    int a;

    char c;

    int buf_len = 100;

    

    while(1)

    {

      sleep(5);

      gets(ch2);

      printf("ch2 = %s\n",ch2);

    }

    while(1)

    {

     c = mygetch();

     printf("c=0x%x",c);

    }

    while(1)

    {

       scanf("%d",&a);

       getchar();

       printf("haha1\n");

       gets(ch1);

       printf("haha2\n");

       getchar();

       printf("haha3\n");      

        

    }

  

 /*

unsigned int i=0xff,j=0xFA,a=3,b=100;

short m=0x55;

unsigned short k=0x55;

char mac[20];

    char tmp[80];

char line[80];

    int count = 0;

FILE* fp = fopen( "dev_rev", "r" );

if(fp == NULL)

printf("open errer\n");

memset(tmp,0,80);

    memset(line,0,80);

count = fread(tmp,1,80,fp);

sprintf(line,"%d.%d.%d.%d",tmp[7],tmp[6],tmp[5],tmp[4]);

printf("count = %d\n",count);

// udpsend(FRM_DEV_INFO_HW_REV,tmp,count);

printf("%s",line);

fclose( fp );

  memset(mac,0,20);

  sprintf(mac,"%x:%x:%x:%x:%x:%x",0x11,0x22,0x33,0x44,0x55,0x66);

  printf("%s\n",mac);

a = (i<<8)+j;

printf("a=%04X\n",a);

printf("int = %d short = %d\n",sizeof(int),sizeof(unsigned short));

printf("m = 0x%04X,k = 0x%04X\n",m,k);

    printf("%d,%d,%d,%d,%d,%d",'s'-'a','e'-'a','c'-'a','r'-'a','e'-'a','t'-'a');

    */

}