fenshu.rar_fenshu

//--------------------------------------------------------------------------- #include<iostream> #include<cmath.h> using namespace std; //--------------------------------------------------------------------------- class fraction { int above; //分子 int below; //分母 void reduction(); //约分函数 void makeCommond(fraction&); //通分函数 public: fraction(int a = 0, int b = 1) //构造函数 {above=a; below=b;} fraction add(fraction); //两分数相加（本分数加上实参分数） fraction sub(fraction); //两分数相减（本分数减去实参分数） fraction mul(fraction); //两分数相乘（本分数乘以实参分数） fraction div(fraction); //两分数相除（本分数除以实参分数） fraction reciprocal(); //求倒数 bool equal(fraction); //等于运算（本分数是否等于实参分数） bool greaterThan(fraction); //大于运算（本分数是否大于实参分数） bool lessThan(fraction); //小于运算（本分数是否小于实参分数） void display(); //显示分数 void input(); //输入分数 }; //---------------------------------------------------------------------------- void fraction::reduction() //约分先求最大公约数 { int a,b,temp; if(below<0){above=-above;below=-below;} a=abs(above); b=abs(below); while(a%b){ temp=a; a=b; b=temp%b;} above/=b; below/=b; } void fraction ::makeCommond(fraction&b) //通分 { int temp; reduction(); b.reduction(); above*=b.below; b.above*=below; temp=below*b.below; below=b.below=temp;} fraction fraction::add(fraction b) //两分数相加 { makeCommond( b); fraction temp; temp.above=above+b.above; temp.below=below; temp.reduction(); return temp;} fraction fraction::sub(fraction b) //两分数相减 { makeCommond(b); fraction temp; temp.above=above-b.above; temp.below=below; temp.reduction(); return temp; } fraction fraction:: mul(fraction b)//两分数相乘 { fraction temp; temp.above=above*b.above; temp.below=below*b.below; temp.reduction(); return temp; } fraction fraction:: div(fraction b)//两分数相除 { makeCommond(b); fraction temp; temp.above=above; temp.below=b.above; temp.reduction(); return temp; } fraction fraction::reciprocal() //求倒数 { fraction temp; temp.above=below; temp.below=above; temp.reduction(); return temp ;} bool fraction::equal(fraction b)//等于运算 { makeCommond(b); if(above==b.above) return 1 ; } bool fraction::greaterThan(fraction b)//大于运算 { makeCommond(b); if(above>b.above) return 1 ; } bool fraction::lessThan(fraction b) //小于运算 { makeCommond(b); if(above<b.above) return 1 ; } void fraction::display() //显示分数 { reduction(); cout<<above<<"/"<<below<<endl;} void fraction::input() //输入分数 { cout<<"please input:"<<endl; cin>>above>>below ; while(below==0) {cout<<"输入分母不能为零"<<endl<<"请重新输入:"<<endl; cin>>above>>below ;} reduction(); return ;} //--------------------------------------------------------------------------- int main() { fraction f1(-3, -5), f2(-3, 5), f3(3, -7), f4, f5(8); cout<<"f1 "; f1.display(); cout<<"f2 "; f2.display(); cout<<"f3 "; f3.display(); cout<<"f4 "; f4.display(); cout<<"f5 "; f5.display(); if (f1.greaterThan(f2)) cout<<"f1>f2"<<endl; if (f2.lessThan(f3)) cout<<"f2<f3"<<endl; if (f1.equal(f1)) cout<<"f1==f1"<<endl; f4 = f1.add(f3); cout<<"f4=f1+f3 "; f4.display(); f4 = f1.sub(f2); cout<<"f4=f1-f2 "; f4.display(); f4 = f1.mul(f3); cout<<"f4=f1*f3 "; f4.display(); f4 = f1.div(f3); cout<<"f4=f1/f3 "; f4.display(); f4 = f2.reciprocal(); cout<<"f4=1/f2 "; f4.display(); f4.input(); cout<<"f4 "; f4.display(); return 0;}