Ex$.2-$ Hundred of a number

Develop a program that reads an integer from the keyboard and prints the digit

corresponding to the hundreds place.

NOTE: In the examples below, bold text represents the user's typing, and italicized text

represents the program's output.

Example $1$:

$2500$

$5$

Example $2$:

$2031$

$0$

Example $3$:

$6975$

$9$

Ex$.3-$ Sphere Volume

Develop a program that reads a real number representing the diameter $($in meters$)$ of a

sphere. Calculate and print the volume of this sphere.

Remember that the volume of a sphere is given by the formula:

$V=\frac{4}{3}{R}^3$

Use $=3\mathrm{.}14$

NOTE: In the examples below, bold text represents the user's typing, and italicized text

represents the program's output.

Example $1$:

$3$

$14\mathrm{.}13$

Example $2$:

$10$

$523\mathrm{.}333$