[数字] [度/弧度]
的[sin / cos / tan]是多少
那么现在我几乎完成了弧度，但由于某种原因切线决定搞砸......当我检查错误时，它告诉我棕褐色（pi）是-1.22465e-16 ......？ ？什么tan（pi）实际上是0.它还在cpp.sh中告诉我同样的事情：http://cpp.sh/6m5q3 ..我在dictonary类源文件中的游戏代码是：
#include<vector>
#include "../Header Files/Dictonary.h"
#ifndef PI
#define PI 3.14159265358979323846
#endif
Dictonary::Dictonary()
{
}
int myRand(int low, int high)
{
return rand() % (high - low + 1) + low;
}
string Dictonary::randomArray(const string &opt)
{
short ran = myRand(0,16);
if(opt.compare("degree") == 0)
return ( (arrayPossibledegrees[ran]) );
else
return ( (arrayPossibleRandians[ran]) );
}
string Dictonary::radOrDegRAND()
{
return(radDeg[myRand(0,1)]);
}
string Dictonary::getPossibleArethemtic()
{
return(possibleArethemtic[myRand(0,2)]);
}
double Dictonary::getComputedValue()
{
string unit = this -> radOrDegRAND();
string arethemtic = this -> getPossibleArethemtic();
string userAnswer;
double userAnwserDoub, AIANWSERDOUB;
//Ex; pi/2
string val = randomArray(unit);
cout << "\n\nWhat is the " << arethemtic << " Of " <<val << " " << unit << endl;
std::cin >> userAnswer;
checkUserAnwser(userAnswer,userAnwserDoub);
//VALUE
if(unit == "radian")
{
checkVAL(val,AIANWSERDOUB);
if(arethemtic.compare("sin") == 0)
{
cout << "USER ANWSER : " << userAnwserDoub << endl;
cout << "The Sin of " << AIANWSERDOUB << "Is " << sin(AIANWSERDOUB) << endl;
}
else if(arethemtic.compare("cos") == 0)
{
cout << "USER ANWSER : " << userAnwserDoub << endl;
cout << "The Cos of " << AIANWSERDOUB << " Is " << cos(AIANWSERDOUB) << endl;
}
else
{
cout << "USER ANWSER : " << userAnwserDoub << endl;
cout << "The Tan of " << AIANWSERDOUB << " Is " << tan(AIANWSERDOUB) << endl;
}
}
}
double Dictonary::conversionPItoREAL(string piNONREAL)
{
short PIREAL;
//Conversion "pi/2" to PI/2 MATH FORM
//"11pi/2" to 11PI/2
//"3pi/2" to 3PI/2
if(piNONREAL.find("p"))
{
}
}
//Check Anwser
void Dictonary::checkUserAnwser(string &userAnswer, double &userAnwserDoub)
{
if(userAnswer.compare("s(3)/2"))
userAnwserDoub = (sqrt(3)/2);
else if(userAnswer.compare("-s(3)/2"))
userAnwserDoub = (-(sqrt(3)/2));
else if(userAnswer.compare("s(2)/2"))
userAnwserDoub = (sqrt(2)/2);
else if(userAnswer.compare("-s(2)/2"))
userAnwserDoub = (-(sqrt(2)/2));
else if(userAnswer.compare("-1/2"))
userAnwserDoub = ((-1)/2);
else if(userAnswer.compare("1/2"))
userAnwserDoub = (1/2);
else if(userAnswer.compare("0"))
userAnwserDoub = (0);
else if(userAnswer.compare("-1"))
userAnwserDoub = (-1);
else if(userAnswer.compare("1"))
userAnwserDoub = (1);
else if(userAnswer.compare("s(3)"))
userAnwserDoub = (sqrt(3));
else if(userAnswer.compare("-s(3)"))
userAnwserDoub = (-(sqrt(3)));
else if(userAnswer.compare("-s(3)/3"))
userAnwserDoub = (-((sqrt(3))/3));
else if(userAnswer.compare("s(3)/3"))
userAnwserDoub = ( (sqrt(3))/3 );
else
{
cout << "INVALID NUMBER. EXITING OUT OF PROGRAM " << endl;
exit(1);
}
}
void Dictonary::checkVAL(string &val, double &AIANWSERDOUB)
{
/*
string arrayPossibleRandians[17] = { "0","pi/6", "pi/4" "pi/3", "pi/2", "2pi/3", "3pi/4", "5pi/6"
,"pi", "7pi/6", "5pi/4", "4pi/3", "3pi/2", "5pi/3", "7pi/4"
,"11pi/6", "2pi" };
*/
if(val.compare("0") == 0)
AIANWSERDOUB = 0;
else if(val.compare("pi/6") == 0)
AIANWSERDOUB = (PI/6);
else if(val.compare("pi/4") == 0)
AIANWSERDOUB = (PI/4);
else if(val.compare("pi/3") == 0)
AIANWSERDOUB = (PI/3);
else if(val.compare("pi/2") == 0)
AIANWSERDOUB = (PI/2);
else if(val.compare("2pi/3") == 0)
AIANWSERDOUB = ( (2*PI) / 3);
else if(val.compare("3pi/4") == 0)
AIANWSERDOUB = ( (3*PI) / 4);
else if(val.compare("5pi/6") == 0)
AIANWSERDOUB = ( (5*PI) /6 );
else if(val.compare("pi") == 0)
AIANWSERDOUB = PI;
else if(val.compare("7pi/6") == 0)
AIANWSERDOUB = ( (7*PI)/6 );
else if(val.compare("5pi/4") == 0)
AIANWSERDOUB = ( (5*PI) /4);
else if(val.compare("4pi/3") == 0)
AIANWSERDOUB = ( (4*PI) /3);
else if(val.compare("3pi/2") == 0)
AIANWSERDOUB = ( (3*PI)/2 );
else if(val.compare("5pi/3") == 0)
AIANWSERDOUB = ( (5*PI) /3 );
else if(val.compare("7pi/4") == 0)
AIANWSERDOUB = ( (7*PI) /4 );
else if(val.compare("11pi/6") == 0)
AIANWSERDOUB = ( (11*PI) /6 );
else if(val.compare("2pi") == 0)
AIANWSERDOUB = (2*PI);
}
//degreeToRadians
double Dictonary::d2r(double d)
{
return(d/180) * ((double) PI);
}
Dictonary::~Dictonary()
{
}
解决我的问题。制作自定义Tan功能：
//AI
double Dictonary::customTan(double convertToTan)
{
double returned;
if(convertToTan == 0)
returned = 0;
else if(convertToTan == (PI/6))
returned = (sqrt(3)/3);
else if(convertToTan == (PI/4))
returned = 1;
else if(convertToTan == (PI/3))
returned = sqrt(3);
else if(convertToTan == (PI/2))
{
cout << "GAME EXITING. UNDEFINED NUMBER " << endl;
exit(1);
}
else if(convertToTan == ((2*PI) / 3))
returned = -(sqrt(3));
else if(convertToTan == ((3*PI) / 4))
returned = -1;
else if(convertToTan == ((5*PI) /6))
returned = (-((sqrt(3))/3));
else if(convertToTan == PI)
returned = 0;
else if(convertToTan == (7*PI)/6)
returned = ( (sqrt(3))/3 );
else if( convertToTan == (5*PI) /4 )
returned = 1;
else if((4*PI) /3)
returned = sqrt(3);
else if( convertToTan == (3*PI)/2 )
{
cout << "GAME EXITING. UNDEFINED NUMBER " << endl;
exit(1);
}
else if(convertToTan == (5*PI) /3 )
returned = -sqrt(3);
else if(convertToTan == ( (7*PI) /4))
returned = -1;
else if(convertToTan == ((11*PI) /6))
returned = (-((sqrt(3))/3));
else if(convertToTan == (2*PI))
returned = 0;
else
{
cout << "INVALID NUMBER. EXITING OUT OF PROGRAM " << endl;
exit(1);
}
return returned;
}