问题描述: 一组IP地址可能包含有A,B,C,D,E五类地址,请按照IP地址类型输出,相同的Ip地址类型按照IP地址大小排序,按照IP对应整数的大小从小到大排序,错误的IP地址不参与排序 A类IP地址 最高位必须为”0” B类IP地址 最高位为”10“ C类IP地址 最高位”110“ D类IP地址 最高位为”1110” E类IP地址 最高位必须为“11110”
错误的IP地址,任意一个IP地址任意一个字节大于255
输入描述: 输入5行。每行均为一个IP地址,IP地址可以是错误,错误的IP地址不参与排序
输出N行,每行输出相同类型的IP地址大小排序,使用“[]”包围所有值,使用,分割
#include <string> #include <vector> #include <iostream> #include <algorithm> using namespace std; int stringtoint(string str) { int begin = 0; vector<int> vec; for (int i = 0; i != str.size(); ++i) { if (str[i] == '.') { int temp=atoi(str.substr(begin, i).c_str()); if (temp < 0 || temp>255) return -1; vec.push_back(atoi(str.substr(begin, i).c_str())); begin = i + 1; } } int temp = atoi(str.substr(begin, str.size()).c_str()); if (temp < 0 || temp>255) return -1; vec.push_back(temp); int n = (vec[0] << 24) | (vec[1] << 16) | (vec[2] << 8) | vec[3]; return n; } string value_to_ip(int& nValue) { char strTemp[20]; sprintf_s(strTemp, "%ld.%ld.%ld.%ld", (nValue & 0xff000000) >> 24, (nValue & 0x00ff0000) >> 16, (nValue & 0x0000ff00) >> 8, (nValue & 0x000000ff)); return string(strTemp); } int main() { int n = 0; vector<int> vec; int x = stringtoint("80.1.1.1"); cout << value_to_ip(x) << endl; vec.push_back(stringtoint("80.1.1.1")); vec.push_back(stringtoint("90.1.1.1")); vec.push_back(stringtoint("180.1.1.1")); vec.push_back(stringtoint("190.1.1.1")); vec.push_back(stringtoint("200.1.1.1")); vector<int> A,B,C,D,E; for (auto n : vec){ if ((n & 0x80000000) == 0x00000000) A.push_back(n); else if ((n & 0xC0000000) == 0x80000000) B.push_back(n); else if ((n & 0xE0000000) == 0xC0000000) C.push_back(n); else if ((n & 0xF0000000) == 0xD0000000) D.push_back(n); else if ((n & 0xF8000000) == 0xF0000000) E.push_back(n); } sort(A.begin(), A.end()); sort(B.begin(), B.end()); sort(C.begin(), C.end()); sort(D.begin(), D.end()); sort(E.begin(), E.end()); if (!A.empty()){ cout << "A:["; for (auto c : A) cout << value_to_ip(c) << ","; cout << "]" << endl; } if (!B.empty()) { cout << "B:["; for (auto c : B) cout << value_to_ip(c) << ","; cout << "]" << endl; } if (!C.empty()) { cout << "C:["; for (auto c : C) cout << value_to_ip(c) << ","; cout << "]" << endl; } if (!D.empty()) { cout << "D:["; for (auto c : D) cout << value_to_ip(c) << ","; cout << "]" << endl; } if (!E.empty()) { cout << "E:["; for (auto c : E) cout << value_to_ip(c) << ","; cout << "]" << endl; } return 0; }