1.0 KiB
Geometric Workbench
This is just a simple idea I had to create a simple workbench with small tools to calculate the area of circles, triangles and rectangels. The whole point of this is to input data to for example the rectangle program and the triangle program and save those numbers in shell variables and to able to extract the triangle from the rectangle. To the input is expected to come from STDIN and output goes to STDOUT. So all those programs can exchange numbers with pipes.
Example
Let's assume we have a rectangle a with the base 4 cm and hight 7 cm. Inside this rectangle is a triangle b with the base 3 cm and hight 3 cm. Now we can remove the triangle area from the rectangle area with the following commands.
a=`echo "4 7" | rectangle`; b=`echo "3 3" | triangle`
echo "scale=3; $a - $b" | bc
And the result of this will be 23.500, the remaining area of the rectangle once the triangle is removed.
Compilation
The programs can be compiled all at once with make all or one program at a
time with for example make circle.