Implement the following integer functions:

a) Function celsius returns the Celsius equivalent of a Fahrenheit temperature.
b) Function fahrenheit returns the Fahrenheit equivalent of a Celsius temperature.
c) Use these functions to write a program that prints charts showing the Fahrenheit equivalents of all Celsius temperatures from 0 to 100 degrees, and the Celsius equivalents of all Fahrenheit temperatures from 32 to 212 degrees. Print the outputs in a neat tabular format that minimizes the number of lines of output while remaining readable.

```
// Fahrenheit and Celsius equivalents.
#include
#include
using namespace std;

int celsius( int ); // function prototype
int fahrenheit( int ); // function prototype

int main()
{
// display table of Fahrenheit equivalents of Celsius temperatures
cout << "Fahrenheit equivalents of Celsius temperatures:" << endl;

// create 4 sets of table headers
for ( int t = 0; t < 4; t++ )
cout << setw( 7 ) << "Celsius" << setw( 12 ) << "Fahrenheit ";

cout << endl;

// display temperatures in blocks of 25
for ( int i = 0; i < 25; i++ )
{
for ( int j = 0; j <= 75; j += 25 )
cout << setw( 7 ) << i + j
<< setw( 11 ) << fahrenheit( i + j ) << ' ';

cout << endl;
} // end for

// display equivalent for 100
cout << setw( 64 ) << 100 << setw( 11 ) << fahrenheit( 100 ) << endl;

// display table of Celsius equivalents of Fahrenheit temperatures
cout << "\nCelsius equivalents of Fahrenheit temperatures:" << endl;

// create 4 sets of table headers
for ( int t = 0; t < 4; t++ )
cout << setw( 10 ) << "Fahrenheit" << setw( 9 ) << "Celsius ";

cout << endl;

// display temperatures in blocks of 45
for ( int i = 32; i < 77; i++ )
{
for ( int j = 0; j <= 135; j += 45 )
cout << setw( 10 ) << i + j
<< setw( 8 ) << celsius( i + j ) << ' ';

cout << endl;
} // end for

// display equivalent for 212
cout << setw( 67 ) << 212 << setw( 8 ) << celsius( 212 ) << endl;
} // end main

// celsius returns Celsius equivalent of fTemp,
// given in Fahrenheit
int celsius( int fTemp )
{
return static_cast< int > ( 5.0 / 9.0 * ( fTemp - 32 ) );
} // end function celsius

// fahrenheit returns Fahrenheit equivalent of cTemp,
// given in Celsius
int fahrenheit( int cTemp )
{
return static_cast< int > ( 9.0 / 5.0 * cTemp + 32 );
} // end function fahrenheit
```