```/*************************************************

On a distant wall, you sight a mark of known
height at angle theta1 from the ground.  You sight
the top of the building sights at angle theta2
from the ground.  Write a program that takes in
these two angles in degrees and the height of the
mark in feet & inches (e.g. 6'4") and returns the
height of the building in feet and inches (no
fractions or decimals).  If H is the height of the
known mark, then the building height is given by:

tan(theta2)
Building height = H * -----------
tan(theta1)

*************************************************/
#include <iostream>
#include <cmath>

int getinches();
void writeinches(int);

int main()
{
// Get height H in inches
cout << "Height of mark? ";
int H = getinches();

// Get angles theta1 & theta2 in degrees
double theta1, theta2;
cout << "Theta1? ";
cin >> theta1;
cout << "Theta2? ";
cin >> theta2;

// Calculate Building Height in inches
int BH = H*tan(T2)/tan(T1);

// Write out building height
cout << "Building height is ";
writeinches(BH);
cout << endl;

return 0;
}

/********************************
** Read distance in x'y" format
** and return the dstance in
** inches.
********************************/
int getinches()
{
int f,i;
char c;
cin >> f >> c >> i >> c;
return 12*f + i;
}

/********************************
** convert angle in degrees to
********************************/
{
return a/180*3.14159;
}

/********************************
** Write L inches to screen in
** y'x" format
********************************/
void writeinches(int L)
{
int f = L/12, i = L % 12;
cout << f << '\''
<< i << "\""
<< endl;
}

```