#include <reg51.h>#include <intrins.h>void system_Ini(void);void printW(unsigned int );bit CheckKeyDown(void );unsigned char lastKey, lastKey3,K3; //键顺序吗
void delay(unsigned char x); //x*0.14MS、void keyscan(void);bit DATA_IN();bit coul();void Display();
unsigned char idata buf[8];unsigned char code SEG_Tab[] = {0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x40}; //段码控制unsigned char pos=0;unsigned char temp;
//JP15和JP16用短路帽连接// P1与JP12 用排线连接
int OP1 = 0;int OP2 = 0;int OP = 0;int buff = 0;int key = 0;int Stat = 0;
main(){ system_Ini(); printW(0); for (;;) { if (CheckKeyDown()) { switch (Stat) { case 0: if (key >= 0 && key <= 9) { DATA_IN(); Stat = 1; }
break; case 1: if (key >= 0 && key <= 9) { if (DATA_IN()) Stat = -1;
} else if (key >= 10 && key <= 13) //+ -* / { OP1 = buff; OP = key; Stat = 2; } else if (key == 14) // "=" { OP1 = buff; buff = 0; Stat = 6; } else if (key == 15) // "C" { buff = 0; Stat = 0; }
break;
case 2: if (key >= 0 && key <= 9) { buff = 0; DATA_IN(); Stat = 3;
} else if (key >= 10 && key <= 13) //+ -* / {
OP = key;
} else if (key == 14) // "=" {
Stat = 6; } else if (key == 15) // "C" { buff = 0; Stat = 0; }
break;
case 3: if (key >= 0 && key <= 9) { if (DATA_IN()) Stat = -1;
} else if (key >= 10 && key <= 13) //+ -* / { OP2 = buff; buff = 0; if (coul()) Stat = -1; else Stat = 2; } else if (key == 14) // "=" { OP2 = buff; buff = 0; if (coul()) Stat = -1; else Stat = 6; } else if (key == 15) // "C" { buff = 0; Stat = 0; }
break; case 6: if (key >= 0 && key <= 9) { buff = 0; DATA_IN(); Stat = 1;
} else if (key >= 10 && key <= 13) //+ -* / { OP = key; buff = 0; Stat = 2; } else if (key == 14) // "=" {
} else if (key == 15) // "C" { buff = 0; Stat = 0; } break; case -1: default: if (key == 15) // "C" { buff = 0; Stat = 0; } break; } Display();
}
}
}
bit coul(){ bit r = 0 ; switch (OP) { case 10: //"+" OP1 = OP1 + OP2; break; case 11://"-" OP1 = OP1 - OP2; break;
case 12: //"*" OP1 = OP1 *OP2; break;
case 13: // "/" if (OP2 != 0) OP1 = OP1 / OP2; else r = 1; break;
default: r = 1; break;
} if (OP1>9999)r=1 ; return r;}
bit DATA_IN(){ bit Over = 1; buff = buff * 10 + key; if (buff < 9999) Over = 0; return Over;
}
//把一正整数据变为字形并存入缓存区void printW(unsigned int a){ char i=0; char b; for(i=0;i<8;i++) { b=a%10; a=a/10; if (a==0 && b==0 && i>0) buf[7-i]=0; else buf[7-i]=SEG_Tab[b];