41 lines
1.2 KiB
C++
41 lines
1.2 KiB
C++
#pragma once
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#include <string>
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#include <iostream>
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#include <fstream>
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#include <vector>
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std::vector<size_t>& readFromFile(const char* filePath)
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{
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std::vector<size_t> numbers;
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std::cout << "read file: " << filePath << "..." << std::endl;
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std::ifstream in(filePath);
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if (in.is_open())
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{
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std::string line;
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std::getline(in, line);
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std::cout << "read line " << line << std::endl;
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size_t count = std::stoi(line);
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std::cout << "total: " << count << " elems" << std::endl;
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size_t idx = 0;
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while (in.good() && idx < count) {
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std::getline(in, line);
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std::cout << "readline: " << line << std::endl;
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//long val = std::stol(line);
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//std::cout << "as long: " << val << std::endl;
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unsigned long ulval = std::stoul(line);
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std::cout << "as unsigned long: " << ulval << std::endl;
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numbers.push_back(ulval);
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idx++;
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}
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}
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else std::cout << "Error opening " << filePath << std::endl;
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if (!in.eof() && in.fail())
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std::cout << "error reading " << filePath << std::endl;
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in.close();
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return numbers;
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} |