29 lines
756 B
C++
29 lines
756 B
C++
#include <iostream>
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#include <cmath>
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#ifdef M_E
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static double euler_e = M_E;
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#else
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static double euler_e = std::exp(1); // standard fallback
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#endif
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#ifdef M_PI
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static double pi = M_PI;
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#else
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static double pi = std::acos(-1);
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#endif
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int main()
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{
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std::cout << "e = " << euler_e
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<< "\npi = " << pi
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<< "\nsqrt(2) = " << std::sqrt(2.0)
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<< "\nln(e) = " << std::log(e)
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<< "\nlg(100) = " << std::log10(100.0)
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<< "\nexp(3) = " << std::exp(3.0)
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<< "\n|-4.5| = " << std::abs(-4.5) // or std::fabs(4.0); both work in C++
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<< "\nfloor(4.5) = " << std::floor(4.5)
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<< "\nceiling(4.5) = " << std::ceil(4.5)
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<< "\npi^2 = " << std::pow(pi,2.0) << std::endl;
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}
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