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@komasaru

komasaru/rank.cpp

Last active Sep 7, 2020
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What would you like to do?
C++ source code to rank, considering same ranks.
/***************************************************************
Rank of numbers (integer)
$ g++ -std=c++17 -Wall -O2 --pedantic-errors -o rank rank.cpp
DATE AUTHOR VERSION
2020.08.31 mk-mode.com 1.00 新規作成
Copyright(C) 2020 mk-mode.com All Rights Reserved.
***************************************************************/
#include <iostream> // for cout
#include <regex> // for regex_search
namespace funcs {
bool is_int(std::string s) {
std::smatch m;
std::regex re("^[+-]?\\d+$");
try {
if (!std::regex_search(s, m, re)) return false;
} catch (std::regex_error& e) {
return false;
}
return true;
}
bool rank_int(std::vector<int>& ns, std::vector<int>& rs) {
unsigned int s;
unsigned int i;
unsigned int j;
unsigned int c;
try {
s = ns.size();
for (i = 0; i < s; i++) {
c = 0;
for (j = 0; j < s; j++) {
if (ns[i] < ns[j]) c++;
}
rs.push_back(c + 1);
}
} catch (...) {
return false;
}
return true;
}
void display(std::vector<int>& ns, std::vector<int>& rs) {
std::vector<int>::iterator it; // イテレータ
try {
std::cout << "---" << std::endl;
std::cout << "VALS = [";
for (it = ns.begin(); it != ns.end(); ++it) {
std::cout << *it;
if (it != ns.end() - 1) std::cout << ", ";
}
std::cout << "]" << std::endl;
std::cout << "RANK = [";
for (it = rs.begin(); it != rs.end(); ++it) {
std::cout << *it;
if (it != rs.end() - 1) std::cout << ", ";
}
std::cout << "]" << std::endl;
} catch (...) {
throw;
}
}
}
int main(int argc, char* argv[]) {
std::string buf; // 入力バッファ
std::vector<int> ns; // 入力値
std::vector<int> rs; // ランク
try {
// 値入力
while (true) {
std::cout << "n? ";
getline(std::cin, buf);
if (buf.empty()) break;
if (!funcs::is_int(buf)) {
std::cout << "NOT INTEGER !!" << std::endl;
continue;
}
ns.push_back(stoi(buf));
}
// ランク計算
if (!funcs::rank_int(ns, rs)) {
std::cout << "[ERROR] Failed to rank!" << std::endl;
return EXIT_FAILURE;
}
// 結果出力
funcs::display(ns, rs);
} catch (...) {
std::cerr << "EXCEPTION!" << std::endl;
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}
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