51单片机+c+keil=计算器

#include <reg52.h> #include "anjian.h" /*数码管位选io口*/ sbit x = P2^2; sbit y = P2^3; sbit z = P2^4; char code smgduan[16] = {0x3f, 0x06, 0x5b, 0x4f, 0x66, 0x6d, 0x7d, 0x07, 0x7f, 0x6f, 0x77, 0x7c, 0x39, 0x5e, 0x79, 0x71};/*0~15的显示*/ char code smgxiaoshu[10] = {0xbf, 0x86, 0xdb, 0xcf, 0xe6, 0xed, 0xfd, 0x87, 0xff, 0xef};/*0~9带小数点*/ void Smgxy(); void SMG(int a, int b)/*数码管组函数*/ { Smgxy(); delay(10); switch(a) { case(1): x = 0; y = 0; z = 0; break; case(2): x = 1; y = 0; z = 0; break; case(3): x = 0; y = 1; z = 0; break; case(4): x = 1; y = 1; z = 0; break; case(5): x = 0; y = 0; z = 1; break; case(6): x = 1; y = 0; z = 1; break; case(7): x = 0; y = 1; z = 1; break; case(8): x = 1; y = 1; z = 1; break; }/*位选完成*/ P0 = smgduan[b]; delay(200); } void Smgxy()/*数码管消影*/ { int a = 8; for(a; a > 0; a--) { switch(a) { case(1): x = 0; y = 0; z = 0; break; case(2): x = 1; y = 0; z = 0; break; case(3): x = 0; y = 1; z = 0; break; case(4): x = 1; y = 1; z = 0; break; case(5): x = 0; y = 0; z = 1; break; case(6): x = 1; y = 0; z = 1; break; case(7): x = 0; y = 1; z = 1; break; case(8): x = 1; y = 1; z = 1; break; }/*位选完成*/ P0 = 0x00; } } void smg_W(int a) { Smgxy(); switch(a) { case(1): x = 0; y = 0; z = 0; break; case(2): x = 1; y = 0; z = 0; break; case(3): x = 0; y = 1; z = 0; break; case(4): x = 1; y = 1; z = 0; break; case(5): x = 0; y = 0; z = 1; break; case(6): x = 1; y = 0; z = 1; break; case(7): x = 0; y = 1; z = 1; break; case(8): x = 1; y = 1; z = 1; break; }/*位选完成*/ } void smg_D(long int c)/*多个数码管显示*/ { if (c == 0) { smg_W(1); P0 = 0x3f; } if (c > 0) { int b; for (b = 1; c > 0; b++) { SMG(b, c % 10); c = c / 10; } } if (c < 0) { int b, e; e = -c; for (b = 1; e > 0; b++) { SMG(b, e % 10); e = e / 10; } smg_W(b); P0 = 0x40; } delay(200); Smgxy(); }