[語法] run time error

看板C_and_CPP作者warewolf (一個人)時間15年前 (2010/01/06 19:34)推噓3(3推 0噓 6→)

留言9則, 4人參與討論串1/1

我要寫一個polynomial的程式要overloading + - * = 可是我寫完compile是對了可是寫main測試之後卻是run time error 我不知道問題出在哪邊..... 可以幫我看一下嗎 header #include <iostream> using namespace std; class polynomial { friend istream & operator>>(istream & cin,polynomial &); public: polynomial(int=10); polynomial operator+(polynomial & right); polynomial operator-(polynomial & right); polynomial operator*(polynomial & right); polynomial operator=(polynomial & right); bool operator==(polynomial & right); bool operator!=(polynomial & right) { return !(*this==right); } void getsize(); ~polynomial(); private: int *aptr; int size; }; 然後是 cppp #include<iostream> #include "11.17.h" using namespace std; polynomial::polynomial(int a) { size=a; aptr=new int[a]; for(int i=0;i<size;i++) aptr[i]=0; } istream & operator>>(istream & cin,polynomial &right) { for(int i=0;i<right.size;i++) cin>>right.aptr[i]; return cin; } polynomial polynomial::operator +(polynomial &right) { int b,c; if(size<right.size){b=size;c=right.size;} else{c=size;b=right.size;}; polynomial a(c); if(size<right.size) {for(int i=0;i<size;i++) a.aptr[i]=(*this).aptr[i]+right.aptr[i]; for(int j=size;j<right.size;j++) a.aptr[j]=right.aptr[j];} else {for(int i=0;i<right.size;i++) a.aptr[i]=(*this).aptr[i]+right.aptr[i]; for(int j=right.size;j<size;j++) a.aptr[j]=aptr[j];} return a; } polynomial polynomial::operator -(polynomial &right) { polynomial a; if(size<right.size) for(int i=0;i<size;i++) a.aptr[i]=(*this).aptr[i]-right.aptr[i]; else for(int i=0;i<right.size;i++) a.aptr[i]=(*this).aptr[i]-right.aptr[i]; return a; } polynomial polynomial::operator *(polynomial &right) { polynomial a(size*right.size); for(int i=0;i<size;i++) for(int j=0;j<right.size;j++) a.aptr[i]=(*this).aptr[i]*right.aptr[j]+a.aptr[i]; return a; } bool polynomial::operator ==(polynomial &right) { if (size!=right.size) return false; for(int i=0;i<size;i++) if(aptr[i]!=right.aptr[i]) return false; return true; } polynomial polynomial::operator =(polynomial &right) { if(&right !=this) { if(size !=right.size) { delete [] aptr; size=right.size; aptr=new int[size]; } for(int i=0;i<size;i++) aptr[i]=right.aptr[i]; } return *this; } polynomial::~polynomial() { delete [] aptr; } void polynomial::getsize() { cout<<size; } 謝謝..... -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 114.43.45.42

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