这里会显示出您选择的修订版和当前版本之间的差别。
两侧同时换到之前的修订记录 前一修订版 后一修订版 | 前一修订版 | ||
c [2022/12/16 23:12] admin |
c [2022/12/16 23:23] (当前版本) admin |
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行 72: | 行 72: | ||
return result; | return result; | ||
} | } | ||
+ | ifstream fin(inputFile); //打开文件流操作 | ||
+ | ofstream fin_new(outputFile); | ||
+ | string line; | ||
+ | int rollnum, count = 0; | ||
+ | vector<vector<int>> vec; | ||
+ | while (getline(fin, line)) //整行读取,换行符“\n”区分,遇到文件尾标志eof终止读取 | ||
+ | { | ||
+ | count++; | ||
+ | cout << "line" << count<<":" << line << endl; //整行输出 | ||
+ | istringstream sin(line); //将整行字符串line读入到字符串流istringstream中 | ||
+ | vector<string> row; //声明一个字符串向量 | ||
+ | string word; | ||
+ | while (getline(sin, word, ',')) //将字符串流sin中的字符读入到word字符串中,以逗号为分隔符 | ||
+ | { | ||
+ | row.push_back(word); //将刚刚读取的字符串添加到向量row中 | ||
+ | } | ||
+ | vector<int> v1; | ||
+ | for (int i = 0; i < row.size(); i++) { | ||
+ | v1.push_back(stoi(row[i])); | ||
+ | } | ||
+ | vec.push_back(v1); | ||
+ | } | ||
+ | fin_new << vec[j][i]; | ||
+ | fin_new.close(); | ||
+ | fin.close(); | ||
+ | |||
+ | //Point类,运算符重载 | ||
+ | #include <iostream> | ||
+ | class Point | ||
+ | { | ||
+ | public: | ||
+ | Point(double x,double y):_x(x),_y(y){}; | ||
+ | bool operator >(const Point& p) | ||
+ | { | ||
+ | return (_x*_x+_y*_y)>(p._x*p._x+p._y*p._y); | ||
+ | } | ||
+ | bool operator ==(const Point& p) | ||
+ | { | ||
+ | return (_x*_x+_y*_y)==(p._x*p._x+p._y*p._y); | ||
+ | } | ||
+ | bool operator <(const Point& p) | ||
+ | { | ||
+ | return (_x*_x+_y*_y)<(p._x*p._x+p._y*p._y); | ||
+ | } | ||
+ | private: | ||
+ | double _x; | ||
+ | double _y; | ||
+ | friend std::ostream& operator<<(std::ostream& os,const Point &point) | ||
+ | { | ||
+ | os<<"Point:("<<point._x<<","<<point._y<<")\n"; | ||
+ | return os; | ||
+ | } | ||
+ | |||
+ | }; | ||
</code> | </code> |