C程序設(shè)計實驗6

1、實驗6運算符重載實驗目的掌握運算符重載的規(guī)則；掌握運算符成員函數(shù)與運算符友元函數(shù)的實現(xiàn)及應用； 學會定義類中單目和雙目運算符的重載函數(shù)； 理解重載運算符的作用，學會對典型的運算符進行重載。實驗學時本次實驗需要2個學時。實驗要求實驗上機之前，根據(jù)實驗內(nèi)容要求，自行設(shè)計編寫程序，完成預習報告。 實驗上機時調(diào)試并修正程序。提交實驗報告。當次上機結(jié)束前分析錯誤原因并給出實驗結(jié)論，實驗內(nèi)容real和虛咅E image。定義該+，-（友元函數(shù)），前置和 （友元函數(shù)）。在main函數(shù)里1.基礎(chǔ)部分（1）定義復數(shù)類comp lex，包括私有數(shù)據(jù)成員實部 類的構(gòu)造，拷貝構(gòu)造，析構(gòu)函數(shù)。為該類重載運算符 后置+,

2、-（成員函數(shù)），插入符和提取符， 定義復數(shù)對象，測試重載的這些運算符。2.進階部分（2）設(shè)計一個mystring類，包括數(shù)據(jù)成員char * pstr;和int length;通過運算 符重載實現(xiàn)字符串的輸入 、輸出 、連接+=、賦值=、關(guān)系運算（=、!=、 ）、下標等運算。/* （1）定義復數(shù)類complex，包括私有數(shù)據(jù)成員實部real和虛部image。定義該類的構(gòu)造，拷貝構(gòu)造，析構(gòu)函數(shù)。為該類重載運算符+，-（友元函數(shù)），前置和后置+，-（成員函數(shù)），插入符和提取符 , （友元函數(shù)）。在main函數(shù)里定義復數(shù)對象，測試重載的這些運算符。#in clude<iostream>#

3、in clude<stri ng>using n ames pace std;class Comp lexp ublic:Comp lex(i nt real1=0,i nt image1=0) :real(real1),image(image1)Com pl ex() ;friend Complex op erator+(c onst Complex &a1, const Comp lex &a2);friend Complex op erator-(c onst Complex &a1, const Complex &a2);Comp lex o

4、p erator+();Comp lex op erator+(i nt);Comp lex op erator-();Comp lex op erator-(i nt);friend ostream& op erator<<(ostream& os, const Complex&a3);friend istream& op erator>>(istrea m& is,Complex&a3);p rivate:int real;int image;Comp lex op erator+(c onst Complex &am

5、p;a1, const Complex &a2)retur n CompI ex(a1.real + a2.real, a1.image + a2.image);Comp lex op erator-(c onst Comp lex &a1, const Complex &a2)retur n CompI ex(a1.real - a2.real, a1.image - a2.image);Comp lex Comp lex:o perator+()+real;+image;return *this;Comp lex Comp lex:o perator+(i nt)C

6、omp lex a = *this;+(*this);return a;Comp lex Comp lex:o perator-()-real;-image;return *this;Comp lex Comp lex:o perator-(i nt)Comp lex a = *this;-(*this);return *this;ostream& op erator<<(ostrea m& os, const Complex& a3)os<< a3.real << "+" << a3.image &l

7、t;< "i"return os;istrea m& op erator>>(istream& is, Complex&a3)is >> a3.real >> a3.image;return is;int mai n()Comp lex a4(4,5), a5(6,7),A,B;cout << "a4:" << a4 << en dl;cout << "a5:" << a5 << en dl;cou

8、t << "請重新為a4,a5對象輸入數(shù)據(jù):cin >> a4;cin >> a5;cout << "重新輸入后a4:"<< a4 << en dl;cout << "重新輸入后a5:"<< a5 << en dl;A = a4 + a5;cout << "重載修改后加法A:"cout << A << en dl;A = a4 - a5;cout << "重載修

9、改后減法A:"cout << A << en dl;cout <<"重載修改后 a4 前置 +:"<<+a4 << endl;cout <<"重載修改后 a5 后置 +:" <<a5+ << endl;cout << "重載修改后再次修改的a4前置-:"<< -a4 << endl;cout << "重載修改后再次修改的a5后置-:"<< a5- &l

10、t;< endl;return 0;(2)設(shè)計一個 mystring類，包括數(shù)據(jù)成員 char * pstr;和!=、int length;通過運算符重載實現(xiàn)字符串的輸入>>、輸出 <<、連接+=、賦值關(guān)系運算(=、！=、>、<)、下標等運算。#in clude <iostream> #in clude <stri ng> using n ames pace std;class mystri ng public: mystri ng(char *p);mystri ng() free( pstr);mystri ng&

11、op erator=(mystri ng& s);void op erator+=(mystn ng & a) this->p str = (char*)realloc(this->p str, this->le ngth + a.le ngth + 1);strc py(this->p str + (this->le ngth), a.p str);char& op erator (i nt n);bool op erator =(c onst mystri ng & s) if (strcm p(this->p str,

12、s.p str) = 0) return 1;else return 0;bool op erator !=(c onst mystri ng & s) if (strcm p(this->p str, s.pstr) != 0) return 1;else return 0;bool op erator <(c onst mystri ng & s) if (strcm p(this->p str, s.p str)<0) return 1;else return 0;bool op erator >(c onst mystri ng &

13、 s) if (strcm p(this->p str, s.p str)>0) return 1;else return 0;friend ostream & operator <<(ostream & os, const mystring & s) return os << s.pstr <<strle n(s. pstr); friend istream & op erator >>(istream & is, mystri ng & s) delete s .p str;is &

14、gt;>s.le ngth ;s.p str = new chars .len gth + 1;is >> s.p str;*(s .p str + s.le ngth) = '0'return is;private: char *p str;int len gth;mystri ng:mystri ng(char *p) this->p str = (char*)malloc(strle n(p) + 1);strc py (this->p str, p);this->le ngth = strle n(p);mystri ng&

15、mystri ng: op erator =(mystri ng & s) delete pstr; this->p str = new charstrle n(s.pstr) + 1;if (p str)strc py(this-> pstr, s.p str); return *this;char& mystri ng:o perator(i nt n) static char ch = 0;if (n > len gth | n < 0) cout << "數(shù)組越界"<< endl;return ch;e

16、lse return *( pstr + n);int mai n() mystri ng a("abde"), b("defe");/mystri ng c(a);/cout << c;cout <<<<""<< b << endl;a = b;cout <<<<endl;a += b;cout <<<<endl;cin >> a;cout << a<<endl;if (a > b)c

17、out << "a 字符串更大："<< a << endl;if (a < b)cout << "b 字符串更大："<< b << endl;if (a = b)cout << "a,b 相等"<< a << endl;if (a != b)cout << "a,b 不相等"<< endl;a1 = ' q'cout << a << en dl;實驗心得：本次實驗我們所學習的是函數(shù)的重載，函數(shù) 的重