ex06_03.cpp

是有关C++编程原理教程的例子程序,全,应该对大家有所帮助

// Exercise 6.3: ex06_03.cpp
// Testing the math library functions.
#include <iostream>
using std::cout;
using std::endl;
using std::fixed;

#include <iomanip>
using std::setprecision;

#include <cmath>
using namespace std; 

int main()
{
   cout << fixed << setprecision( 1 ); 

   cout << "sqrt(" << 900.0 << ") = " << sqrt( 900.0 )
      << "\nsqrt(" << 9.0 << ") = " << sqrt( 9.0 );
   cout << "\nexp(" << 1.0 << ") = " << setprecision( 6 ) 
      << exp( 1.0 ) << "\nexp(" << setprecision( 1 ) << 2.0 
      << ") = " << setprecision( 6 ) << exp( 2.0 );
   cout << "\nlog(" << 2.718282 << ") = " << setprecision( 1 ) 
      << log( 2.718282 ) 
      << "\nlog(" << setprecision( 6 ) << 7.389056 << ") = "
      << setprecision( 1 ) << log( 7.389056 );
   cout << "\nlog10(" << 1.0 << ") = " << log10( 1.0 )
      << "\nlog10(" << 10.0 << ") = " << log10( 10.0 ) 
      << "\nlog10(" << 100.0 << ") = " << log10( 100.0 ) ;
   cout << "\nfabs(" << 13.5 << ") = " << fabs( 13.5 )
      << "\nfabs(" << 0.0 << ") = " << fabs( 0.0 )
      << "\nfabs(" << -13.5 << ") = " << fabs( -13.5 );
   cout << "\nceil(" << 9.2 << ") = " << ceil( 9.2 )
      << "\nceil(" << -9.8 << ") = " << ceil( -9.8 );
   cout << "\nfloor(" << 9.2 << ") = " << floor( 9.2 )
      << "\nfloor(" << -9.8 << ") = " << floor( -9.8 );
   cout << "\npow(" << 2.0 << ", " << 7.0 << ") = " 
      << pow( 2.0, 7.0 ) << "\npow(" << 9.0 << ", " 
      << 0.5 << ") = " << pow( 9.0, 0.5 );
   cout << setprecision(3) << "\nfmod("
      << 13.675 << ", " << 2.333 << ") = " 
	   << fmod( 13.675, 2.333 ) << setprecision( 1 ); 
   cout << "\nsin(" << 0.0 << ") = " << sin( 0.0 ); 
   cout << "\ncos(" << 0.0 << ") = " << cos( 0.0 );
   cout << "\ntan(" << 0.0 << ") = " << tan( 0.0 ) << endl;
   return 0; // indicates successful termination
} // end main



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