4w3:第四周程序填空题1
描述
下面程序的输出是：
3+4i
5+6i
请补足Complex类的成员函数。不能加成员变量。
#include <iostream>
#include <cstring>
#include <cstdlib>
using namespace std;
class Complex {
private:
double r,i;
public:
void Print() {
cout << r << "+" << i << "i" << endl;
}
// 在此处补充你的代码
};
int main() {
Complex a;
a = "3+4i"; a.Print();
a = "5+6i"; a.Print();
return 0;
}
输入无输出3+4i
5+6i样例输入
None
样例输出
3+4i 5+6i
Approach:
#include <iostream>
#include <cstring>
#include <cstdlib>
using namespace std;
class Complex {
private:
double r,i;
public:
void Print() {
cout << r << "+" << i << "i" << endl;
}
Complex(): r(0), i(0){};
Complex& operator=(string s) {
int pos = s.find('+', 0);
string sTmp = s.substr(0, pos);
r = stoi(sTmp);
sTmp = s.substr(pos+1);
i = stoi(sTmp);
}
};
int main() {
Complex a;
a = "3+4i"; a.Print();
a = "5+6i"; a.Print();
return 0;
}