Write a program that tests whether the examples of the math library function calls shown in Fig. 5.2 actually produce the indicated results.

Question

What will be an ideal response?

Answer 1

See the following program:
```
// Testing the math library functions.
#include
#include
#include
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(" << 5.1 << ") = " << fabs( 5.1 )
<< "\nfabs(" << 0.0 << ") = " << fabs( 0.0 )
<< "\nfabs(" << -8.76 << ") = " << fabs( -8.76 );
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("
<< 2.6 << ", " << 1.2 << ") = "
<< fmod( 2.6, 1.2 ) << setprecision( 1 );
cout << "\nsin(" << 0.0 << ") = " << sin( 0.0 );
cout << "\ncos(" << 0.0 << ") = " << cos( 0.0 );
cout << "\ntan(" << 0.0 << ") = " << tan( 0.0 ) << endl;
} // end main
```