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cpp:cmath:acos [2012/10/12 18:35] (current)
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 +{{keywords>wiki library source code example reference}}
 +====== acos ======
 +
 +<code cpp>
 +    double acos(double);
 +</code>
 +   calculates arccosine
 +
 +
 +===== cpp Sourcecode Example =====
 +
 +<code cpp>
 +#include <iostream> /* including standard library */
 +#include <cmath> /* including math library */
 +
 +using namespace std;
 +int main ( void ){
 +    double a=0.2, res=0;
 +    res = acos(a) * 90 / 3.17;
 +
 +    //cout.setf(ios::fixed, ios::floatfield);
 +    cout.precision(8);
 +
 +    cout << "acos from " << a << " is " << res << endl;
 +    return 0;
 +}
 +
 +</code>
 +
 +===== output =====
 +
 +    acos from 0.2 is 38.879955
 +
  
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cpp/cmath/acos.txt · Last modified: 2012/10/12 18:35 (external edit)

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