基于51单片机的计算器课程设计实验报告

1、数控无线发射与接收 1.实用 单片机实现简单的计算器功能2.实页脚内容数控无线发射与接收3.实#include#include#include#include#includeunsigned table116; /1602 第一行显示字符unsigned table216; /1602 第二行显示字符 unsigned code table_error error;/* 键扫描函数 */unsigned keyscan() /描键盘函数unsigned key_l,key_h,addres,num;P0=0 x0f;页脚内容数控无线发射与接收key_l=P0;P0=0 xf0;key_h=P0

2、;addres=key_l key_h;if(addres!=0 xff)Delayms(1);if(addres!=0 xff)P0=0 x0f;key_l=P0;P0=0 xf0;key_h=P0;addres=key_l key_h;switch(addres)case 0 xee:num=1;break;case 0 xde:num=2;break;case 0 xbe:num=3;break;case 0 xed:num=4;break;case 0 xdd:num=5;break;case 0 xbd:num=6;break;case 0 xeb:num=7;break;case

3、0 xdb:num=8;break;case 0 xbb:num=9;break;case 0 xd7:num=0;break;/按 case 0 xe7:num=C;break;/键页脚内容数控无线发射与接收case 0 xb7:num=;break;/ 按键case 按键 case 按键 case 键 case 0 x77:num=+;break;/键 while(addres!=0 xff)P0=0 x0f;key_l=P0;P0=0 xf0;key_h=P0;addres=key_l key_h;return return 0;void clear_lcd(void) 清屏unsign

4、ed j;for(j=0;j16;j+)页脚内容 void main()unsigned i=0,j;unsigned key;unsigned flag_operator = 0;unsigned flag_equ 0;unsigned flag_key 0;数控无线发射与接收加减乘除标志位等于标志位运算位标志bit flag_MaxValue = 0;bit flag_minus 0;/负数long int = 0; 最终运算结果unsigned int value_H =0; 第一个数据unsigned int value_L = 0; /第二个数据unsigned int temp=1

5、, 10, 100,1000,10000,100000,1000000,10000000,100000000;Initialize_LCD();while(1)key=keyscan();if(key 0)if(key C) 清除键 按下页脚内容数控无线发射与接收clear_lcd();i=0;flag_operator = 0; flag_equ 0; value = 0; value_H value_L 0; flag_key 0;flag_minus=0;elsefor(j=0; ji; table115-i+j table115-i+j+1;table115 = key;/table1

6、i key;i+;if(key =)for(j=0; j16; =)flag_equ = j;flag_key+;break;确定运算符位置页脚内容数控无线发射与接收if( table1j + j = - = * table1j /)flag_operator = j;flag_key+;for(j=16-i; jflag_operator; 第一个数据处理/value_H = value_H ( 10 , (flag_operator-j-1) value_H value_H + (table1j-48) tempflag_operator-j-1;for(j=flag_operator+1

7、; j15; j+)第二个数据处理/value_L = value_L * pow( , (flag_equ-j-1) );value_L value_L + tempflag_equ-j-1;if(table1flag_operator +)value value_H value_L;else if(table1flag_operator -)value value_H value_L;页脚内容数控无线发射与接收else if(table1flag_operator *)value value_H value_L;else if(table1flag_operator /)value val

8、ue_H value_L;if(value 0)table215 = (value 48);else if(value2000000000)flag_MaxValue = /break;j=15;while(value!=0)table2j (value%10 48);value value/10;页脚内容数控无线发射与接收j-;if(flag_minus) 负数table2j -;if(flag_key | table10 0 flag_MaxValue=1 )ShowString(5,1,table_error);while(keyscan() != C);clear_lcd();i=0;flag_oper