单片机C语言按键开关程序

Question

此程序只有一个按键请问怎么才能在增加一个呢，单片机用STC15F104E

#include<reg52.h>
#define uint unsigned int
#define uchar unsigned char
void delay_ms(uint);
sbit led0=P0^0;
sbit key1=P3^2;
void main()
{
uchar i;
while(1)
{
if(key1==0)
{
delay_ms(10);
if(key1==0)
{
i++;
i=i%2;
switch(i)
{
case 0: led0=1; break;//关小灯
case 1: led0=0; break;//开小灯
default: break;
}
}
while(!key1);
}
}
}
void delay_ms(uint z) //延时子程序
{
uint x,y;
for(x=z;x>0;x--)
for(y=110;y>0;y--);
}

Answer 1

#include<reg52.h>
#define uint unsigned int
#define uchar unsigned char
void delay_ms(uint);
sbit led0=P0^0;
sbit led1=P0^1;
sbit key1=P3^2;
sbit key2=P3^3;
void main()
{
   uchar i=0;
   uchar j=0;
    while(1)
    {
       if(key1==0)//按键1
       {
        delay_ms(10);
        if(key1==0)
        {
            i++;
            i=i%2;
            switch(i)
            {
                 case 0: led0=1; break;//关小灯
                 case 1: led0=0; break;//开小灯
                 default:  break;
            }
        }
        while(!key1);
        }
        
        if(key2==0)//按键2
       {
        delay_ms(10);
        if(key2==0)
        {
            j++;
            j=j%2;
            switch(j)
            {
                 case 0: led1=1; break;//关小灯
                 case 1: led1=0; break;//开小灯
                 default:  break;
            }
        }
        while(!key2);
        }
    }
}
void delay_ms(uint z)  //延时子程序
{  
uint x,y;
for(x=z;x>0;x--)
for(y=110;y>0;y--);
}