51 lines
1.3 KiB
C++
51 lines
1.3 KiB
C++
#include <iostream>
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#include <vector>
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#include <algorithm>
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#include <numeric>
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int main() {
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std::vector<int> a{1,2,3,4};
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std::vector<int> b{5,6,7,8};
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// result vector
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std::vector<double> c(a.size(), 0);
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// double
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std::for_each(a.begin(), a.end(), [](int &n){ n*=2;});
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std::cout << "Double:" << std::endl;
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for (auto const &i: a){ std::cout<<i<<" ";}
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std::cout << std::endl;
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// Reset a
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a = {1,2,3,4};
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// inverse
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std::transform(a.begin(), a.end(),
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c.begin(),
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[](int i){return 1.0/i;});
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std::cout << "Multiplicative inverse:" << std::endl;
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for (auto const &i: c){ std::cout << i << " ";}
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std::cout << std::endl;
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// reziprocal sum
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std::transform(a.begin(), a.end(),
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b.begin(), c.begin(),
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[](int i, int j){return 1.0/(1.0/i + 1.0/j);});
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std::cout << "Reziprocal sum:" << std::endl;
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for (auto const &i: c){ std::cout << i << " ";}
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std::cout << std::endl;
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// Folds
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int sum = std::accumulate(a.begin(), a.end(), 0);
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int diff = std::accumulate(a.begin(), a.end(), 15, std::minus<int>());
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int mult = std::accumulate(a.begin(), a.end(), 1,
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[](int a, int b)->int { return a * b; });
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std::cout << "Sum: " << sum
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<< "\nDiff from 15: " << diff
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<< "\nProd: " << mult
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<< std::endl;
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return 0;
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}
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