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34 lines
722 B
34 lines
722 B
3 years ago
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#include <iostream>
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#include <vector>
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#include <utility>
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#include <algorithm>
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int main() {
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// 1.
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std::vector<std::pair<int, int>> v {{2, 8}, {9, 6}, {4, 7}, {22, 4}, {123, 321}, {1, 1}, {-7, 5}};
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// 2.
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std::sort(std::begin(v), std::end(v), [](const auto& e1, const auto& e2) {
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return e1.first < e2.first;
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});
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// 3.
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bool odd {true};
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for (auto it {std::begin(v)}; it != std::end(v); ++it) {
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if (odd) {
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(*it).second = 0;
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}
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odd = !odd;
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}
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// Print the results
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bool first {true};
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for (const auto& item : v) {
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if (first) first = false;
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else std::cout << ", ";
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std::cout << "(" << item.first << ", " << item.second << ")";
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}
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std::cout << std::endl;
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return 0;
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}
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