c++语言计算器源代码.doc

C++语言编写。。#include<iostream>#include<cmath>#include<string>usingnamespacestd;constdoublepi=;constdoublee=**********;constintSIZE=1000;typedefstructnode//为了处理符号而建立的链表(如:1+(-2)){ chardata; node*next;}node;typedefstructstack_num//存储数的栈{ double*top; double*base;}stack_num;typedefstructstack_char//存储运算符号的栈{ char*top; char*base;}stack_char;stack_numS_num;//定义stack_charS_char;//定义charfu[18]={'\n',')','+','-','*','/','%','^','Q','L','C','S','T','c','s','t','('};pare[1000];//表现出各运算符号的优先级doubleshu[1000];//存储"数"的数组doubledai_result;//运算的结果,是为了处理M运算(简介函数里有M的定义)intbiao=0;//和dia_result一样,为了处理M运算charline[SIZE];//输入的所要计算的表达式voidinit()//初始化{ compare[fu[0]]=-2;//pare[fu[1]]=-1; compare[fu[2]]=2; compare[fu[3]]=2; compare[fu[4]]=4; compare[fu[5]]=4; compare[fu[6]]=4; compare[fu[7]]=5; for(inti=8;i<=15;i++) compare[fu[i]]=6; compare[fu[16]]=7; =(double*)malloc(sizeof(double)*SIZE);//为栈开辟空间 =(char*)malloc(sizeof(char)*SIZE);//同上 =; =;}voidpush_num(doublen)//数字进栈{ *++=n;}voidpush_char(charc)//运算符号进栈{ *++=c;}doublepop_num()//数字出栈{ doublem=*; --; returnm;}charpop_char()//运算符号出栈{ =*; --; ;}charget_top_char()//得到运算符号的栈中最顶端的运算符号{ return*;}doubleoperate(doubley,charc,doublex)//对两个数计算(含是双目运算符:如*,/等等){ doubler; if(c=='-') r=x-y; elseif(c=='+') r=x+y; elseif(c=='/'&&y!=0) r=x/y; elseif(c=='*') r=x*y; elseif(c=='^') { r=1; for(inti=1;i<=y;i++) r*=x; } elseif(c=='%') { intr0=(int)x%(int)y; r=double(r0); } returnr;}doubleoperate_one(doubleone,)//对一个数运算(含单目运算符:如log(L),sin(S)等等){ doubler; =='Q') r=sqrt(one); =='C') r=cos(one); =='S') r=sin(one); =='T') r=tan(one); =='c') r=acos(one); =='s') r=asin(one); =='t') r=atan(one); returnr;}doubleoperate_L(doublea,doubleb,chardian)//求对数的值{ doubler=log(b)/log(a); returnr;}pute()//对整个表达式的计算{ charc;//表示运算符号 intp=0;//用于shu[++p],先初始化 inti,j; init();//进行初始化 push_char('\n'); line[strlen(line)]='\n'; line[strlen(line)+1]='\0'; if(