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#include<reg51.h> #define uchar unsigned char #define uint unsigned int uchar code1[9]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f}; sbit key1=P3^0; sbit key2=P3^1; sbit key3=P3^2; sbit key4=P3^3; sbit key5=P3^4; sbit key6=P3^5; sbit key7=P3^6; sbit key8=P3^7; sbit keep=P2^0; sbit key9=P2^2; void delay(uint t) //延时程序 { uint j; for(;t>0;t--) for(j=121;j>0;j--); } void display(uchar i)//数码管显示 { switch(i) { case 0:P1=code1[0];break; case 1:P1=code1[1];break; case 2:P1=code1[2];break; case 3:P1=code1[3];break; case 4:P1=code1[4];break; case 5:P1=code1[5];break; case 6:P1=code1[6];break; case 7:P1=code1[7];break; case 8:P1=code1[8];break; default:break; } } void key() //键盘扫描，判断哪个人抢答 { uchar n; n=0; display(n); keep=1; if(key1==0) { delay(5); if(key1==0) { n=1; display(n); while(1) { keep=0; //开启蜂鸣器 delay(500); keep=1; delay(500); if(key9==0) { delay(5); if(key9==0) { keep=1; n=0; display(n); while(1)return; } while(!key9); delay(5); while(1); } } } while(!key1); delay(5); } if(key2==0) { delay(5); if(key2==0) { n=2; display(n); while(1) { keep=0; //开启蜂鸣器 delay(500); keep=1; delay(500); if(key9==0) { delay(5); if(key9==0) { keep=1; n=0; display(n); while(1)return; } while(!key9); delay(5); while(1); } } } while(!key2); delay(5); } if(key3==0) { delay(5); if(key3==0) { n=3; display(n); while(1) { keep=0; //开启蜂鸣器 delay(500); keep=1; delay(500); if(key9==0) { delay(5); if(key9==0) { keep=1; n=0; display(n); while(1)return; } while(!key9); delay(5); while(1); } } } while(!key3); delay(5); } if(key4==0) { delay(5); if(key4==0) { n=4; display(n); while(1) { keep=0; //开启蜂鸣器 delay(500); keep=1; delay(500); if(key9==0) { delay(5); if(key9==0) { keep=1; n=0; display(n); while(1)return; } while(!key9); delay(5); while(1); } } } while(!key4); delay(5); } if(key5==0) { delay(5); if(key5==0) { n=5; display(n); while(1) { keep=0; //开启蜂鸣器 delay(500); keep=1; delay(500); if(key9==0) { delay(5); if(key9==0) { keep=1; n=0; display(n); while(1)return; } while(!key9); delay(5); while(1); } } } while(!key5); delay(5); } if(key6==0) { delay(5); if(key6==0) { n=6; display(n); while(1) { keep=0; //开启蜂鸣器 delay(500); keep=1; delay(500); if(key9==0) { delay(5); if(key9==0) { keep=1; n=0; display(n); while(1)return; } while(!key9); delay(5); while(1); } } } while(!key6); delay(5); } if(key7==0) { delay(5); if(key7==0) { n=7; display(n); while(1) { keep=0; //开启蜂鸣器 delay(500); keep=1; delay(500); if(key9==0) { delay(5); if(key9==0) { keep=1; n=0; display(n); while(1)return; } while(!key9); delay(5); while(1); } } } while(!key7); delay(5); } if(key8==0) { delay(5); if(key8==0) { n=8; display(n); while(1) { keep=0; //开启蜂鸣器 delay(500); keep=1; delay(500); if(key9==0) { delay(5); if(key9==0) { keep=1; n=0; display(n); while(1)return; } while(!key9); delay(5); while(1); } } } while(!key8); delay(5); } } void main() { while(1) { key(); } }