使用以下程序当我尝试编译它时,我得到了大量的编译错误。我认为他们有方法调用的东西。我不熟悉c ++,不知道是什么导致了它们。有人可以帮忙吗?这是源代码:
#include <iostream>
using namespace std;
//getting the greatest common divisor to help reduce fractions
int GDC(int x, int y)
{
int t;
while (y!=0)
{
t=y;
y=x%y;
x=t;
}
return x;
}
//constructing a RationalNumber wit a numerator and a denominator as seperate elements.
//it also reduces the fraction as well as show them.
//prevents 0 in the denominator as well as avoid negative denominators
class RationalNumber
{
public:
RationalNumber(int num=0, int denom=0)
{
numerator=num;
denominator=denom;
}
void show()
{
{
cout << "(" << numerator <<"/";
cout << denominator << ")";
}
}
void reduce()
{
int reduction;
reduction= GCD(numerator, denominator);
numerator=numerator/reduction;
denominator=denominator/reduction;
if(denominator == 0)
{
cout << "Cannot compute with 0 denominator ";
}
if(denominator < 0)
{
cout << "Cannot compute negative demoninators ";
}
else
{
//simplifies fraction to a whole number when denominator is 1
if(denominator == 1)
{
cout << "(" << numerator <<")";
}
else
{
cout << "(" << numerator <<"/";
cout << denominator << ")";
}
}
}
RationalNumber operator+(RationalNumber op2);
RationalNumber operator-(RationalNumber op2);
RationalNumber operator*(RationalNumber op2);
RationalNumber operator/(RationalNumber op2);
RationalNumber operator++();
private:
double numerator, denominator;
};
void Accept(int n)
{
if(n<0)
{
cout << "Cannot have negatice denominators: ";
}
else if (n == 0)
cout << "Cannot have zero in the denominator: ";
}
//Division
RationalNumber RationalNumer::operator/(RationalNumber op2)
{
RationalNumber temp;
int reduction;
temp.numerator=(numerator*op2.denominator);
temp.denominator=denominator*op2.numerator;
cout << "Division: ";
return temp;
}
//Subtraction
RationalNumber RationalNumer::operator-(RationalNumber op2)
{
RationalNumber temp;
int reduction;
temp.numerator=(numerator*op2.denominator)-(op2.numerator*denominator);
temp.denominator=op2.denominator* denominator;
cout << "Subtraction: ";
return temp;
}
//Multiplication
RationalNumber RationalNumer::operator*(RationalNumber op2)
{
RationalNumber temp;
temp.numerator=(op2.numerator*numerator);
temp.denominator=op2.denominator* denominator;
cout << "Multiplication: ";
return temp;
}
//Addition
RationalNumber RationalNumer::operator+(RationalNumber op2)
{
RationalNumber temp;
temp.numerator=(op2.numerator*denominator) + ((numerator)*(op2.denominator));
temp.denominator=op2.denominator* denominator;
cout << "Addition: ";
return temp;
}
RationalNumber RationalNumer::operator++()
{
numerator++;
denominator++;
return *this;
}
void getFraction(int &x, int &y, int &z, int &t)
{
cout << "First Fraction: ";
cout << "\n";
cout << "numerator: ";
cin >> x;
do
{
cout << "denominator: ";
cin >> y;
Accept(y);
cout << "\n";
cout << endl;
}
while(y <=0);
cout << "Second Fraction: ";
cout << "\n";
cout << "numerator: ";
cin >> z;
do
{
cout << "denominator: ";
cin >> t;
Accept(t);
cout << "\n";
cout << endl;
}
while(t <=0);
}
void aftermath(int &x, int &y, int &z, int &t)
{
RationalNumber obA, obS, obM, obD, ob2(x,y), ob3(z,t);
char Math;
cout << "Enter sign (+,-,*,/): ";
cin >> Math;
if(Math == '+')
{
obA=ob2+ob3;
obA.reduce();
cout << "\n";
}
else if(Math == '-')
{
obS=ob2-ob3;
obS.reduce();
cout << "\n\n";
}
else if(Math == '*')
{
obM=ob2*ob3;
obM.reduce();
cout << "\n\n";
}
else if(Math == '/')
{
obD=ob2/ob3;
obD.reduce();
cout << "\n\n";
}
else
cout << "Invalid sign";
}
int main()
{
char answer;
do
{
int x,y,z,t = 0;
getFraction(x,y,z,t);
RationalNumber obA, obS, obM, obD, ob2(x,y), ob3(z,t);
ob2.show();
cout <<" ";
ob3.show();
cout << "\n\n";
aftermath(x,y,z,t);
cout << "\n\n";
cout << "Create another fraction? - y or n? ";
cin >> answer;
cout << "\n";
}
while((answer == 'y'));
if((answer != 'y'))
{
cout << "GOOD-BYE ";
}
return 0;
}
以下是编译错误:
g++ -o Math math.cpp
math.cpp: In member function 'void RationalNumber::reduce()':
math.cpp:37: error: 'GCD' was not declared in this scope
math.cpp: In function 'void getFraction(int&, int&, int&, int&)':
math.cpp:136: error: invalid operands of types '<unresolved overloaded function type>' and 'const char [2]' to binary 'operator<<'
math.cpp:151: error: invalid operands of types '<unresolved overloaded function type>' and 'const char [2]' to binary 'operator<<'
答案 0 :(得分:8)
(注意:自从我发布答案以来,Kyle已经更新了输出,因此其中一些缺少正确的上下文。)
第一个错误:你正在调用“GCD”,但你的功能被称为“GDC”。
第二个错误:“RationalNumer”不是“RationalNumber”。
当你在其发生的所有地方修复第二个错误时,大多数或所有其他错误都会消失(其中有五个 - 搜索“RationalNumer”)。
更新输出中的新错误 - 另一个拼写错误:count << "\n";
应为cout << "\n";
。
两条一般性建议:
读取错误消息。 8-)它们通常看起来是难以理解的行话,或者只是说谎,但通常答案确实在那里。
只担心第一个错误。通常,修复会使其他部分或全部消失。