C++課程設(shè)計(計算器)報告

VisualC++課程設(shè)計，輸入數(shù)字，選擇要進行的開方、溫度單位的換算。（改寫成可對實數(shù)操作。（算，注意算法要考慮優(yōu)先級，對項。4器出題目，并數(shù)，且沒有余數(shù)。合運算的分函數(shù)主要有doubleeval_exp(char*exp);//運算四則運算表達式的主函數(shù)，返回結(jié)果、voidoopcalc::sizeyunsuan();//四則運算調(diào)用的主函數(shù)、doubleget_token();//取表達式函數(shù)等。關(guān)頭文件。 則運算主要代碼pcalc::parser()exp_ptr=NULL;//將exp_prt賦值為空指針doubleoopcalc::eval_exp(char*exp)//計算表達式函數(shù)并返回結(jié)果doubleresult;exp_ptr=exp;//將指針指向表達式get_token();//0rror(2);return0.0;eval_exp2(result);if(*token)serror(0);returnresult;voidoopcalc::eval_exp2(double&result)//識別加減符號registercharop;doubletemp;al_exp3(result);while((op=*token)=='+'||op=='-')//判斷指針指向的符號_token();al_exp3(temp);switch(op)//通過switch語句實現(xiàn)判斷case'-':result=result-temp;ak;case'+':result=result+temp;ak;voidoopcalc::eval_exp3(double&result)//識別乘除號與百分號，方法同加減號registercharop;doubletemp;al_exp4(result);while((op=*token)=='*'||op=='/'||op=='%')get_token();temp);switch(op)case'*':result=result*temp;ak;case'/':result=result/temp;ak;case'%':result=(int)result%(int)temp;ak;voidoopcalc::eval_exp4(double&result)doubletemp,ex;registerintt;al_exp5(result);if(*token=='^')get_token();temp);ex=result;(temp==0.0)result=1.0;turn;for(t=(int)temp-1;t>0;--t)result=result*(double)ex;voidoopcalc::eval_exp5(double&result)registercharop;op=0;if((tok_type==DELIMITER)&&*token=='+'||*token=='-')op=*token;_token();al_exp6(result);if(op=='-')result=-result;voidoopcalc::eval_exp6(double&result)if((*token=='('))get_token();result);if(*token!=')')rror(1);_token();elseatom(result);voidoopcalc::atom(double&result)tch(tok_type)caseNUMBER:result=atof(token);_token();turn;ault:rror(0);voidoopcalc::serror(interror)//輸入空時顯示輸入錯誤staticchar*e[]=//將一組字符串賦值給指針"SyntaxError","UnbalancedParentheses",""cout<<e[error]<<endl;//輸出字符串voidoopcalc::get_token()//registerchar*temp;tok_type=0;temp=token;*temp='\0';if(!*exp_ptr)return;while(isspace(*exp_ptr))if(strchr("+-*/%^=()",*exp_ptr))tok_type=DELIMITER;*temp++=*exp_ptr++;elseif(isalpha(*exp_ptr))while(!isdelim(*exp_ptr))*temp++=*exp_ptr++;elseif(isdigit(*exp_ptr))while(!isdelim(*exp_ptr))*temp++=*exp_ptr++;tok_type=NUMBER;*temp='\0';intoopcalc::isdelim(charc)if(strchr("+-/*%^=()",c)||c==9||c=='\r'||c==0)returnreturnvoidoopcalc::sizeyunsuan()//——————————————————————————————四則運charexpstr[80];cout<<"輸入0使計算終止。\n";oopcalcr(;;)cout<<"輸入表達式:";79);//break;//cout<<"結(jié)果是:"<<ob.eval_exp(expstr)<<"\n\n";/*return0;*/cout<<"按任意鍵繼續(xù)\n";tch();u();程序voidoopcalc::test()// charinput;oopcalctem("cls");cout<<"***選擇你測試的題目的類型***\n";cout<<"1:加法運算\n";cout<<"2:減法運算\n";cout<<"3:除法運算\n";cout<<"4:乘法運算\n";cout<<"選擇:";cout<<"=====================================\n";cin>>input;t)case'1':a.calcaddtest();ak;case'2':a.calcsubtest();ak;case'3':a.calcdivtest();ak;case'4':a.calcmulttest();ak;default:a.badinput2();ak;cout<<"是否繼續(xù)測試其他題目:1是,2否!\n";intd=0;>d;tem("cls");a.test()cout<<"按任意鍵繼續(xù)\n";tch();u();voidoopcalc::badinput2()cout<<"錯誤輸入!\n";cout<<"按任意鍵繼續(xù)\n";tem("cls");tch();t();voidoopcalc::calcaddtest() floatanswer1=0,input=0;doublex1,x2;for(inti=0,count1=0;i<10;i++)gaussrand()*10;gaussrand()*10;wer1=add(x1,x2);cout<<"題目"<<i+1<<''<<x1<<"+"<<x2<<"=";cin>>input;answer1)unt1++;cout<<"結(jié)果正確!\n";elsecout<<"結(jié)果錯誤!\n"<<"正確答案為:"<<answer1<<'\n';cout<<"你現(xiàn)在的得分為:\n"<<count1<<'\n';voidoopcalc::calcsubtest(){floatanswer2=0,input;doublex1,x2;for(inti=0,count2=0;i<10;i++)gaussrand()*10;gaussrand()*10;wer2=sub(x1,x2);cout<<"題目"<<i+1<<'\t'<<x1<<"-"<<x2<<"=";cin>>input;answer2)unt2++;cout<<"結(jié)果正確!\n";elsecout<<"結(jié)果錯誤!\n"<<"正確答案為:"<<answer2<<'\n';cout<<"你現(xiàn)在的得分為:\n"<<count2<<'\n';voidoopcalc::calcdivtest(){floatanswer3,input;doublex1,x2;for(inti=0,count3=0;i<10;i++)gaussrand()*10;gaussrand()*10;wer3=div((x1*x2),x2);cout<<"題目"<<i+1<<'\t'<<x1*x2<<"/"<<x2<<"=";cin>>input;answer3)unt3++;cout<<"結(jié)果正確!\n";elsecout<<"結(jié)果錯誤!\n"<<"正確答案為:"<<answer3<<'\n';cout<<"你現(xiàn)在的得分為:\n"<<count3<<'\n';voidoopcalc::calcmulttest(){floatanswer4,input;doublex1,x2;for(inti=0,count4=0;i<10;i++)gaussrand()*10;gaussrand()*10;wer4=mult(x1,x2);cout<<"題目"<<i+1<<'\t'