This C program serves as a basic example for a novice C programmer to understand function usage and structure. This C source code defines a set of functions that perform various mathematical operations. These operations include calculating the square of a number, reading an integer from the user, and computing the area of a rectangle. The main function of the program calls these functions with specific values and prints the results.

We have written this code to adhere to modern C coding standards such as proper function declarations, indentation, and the inclusion of the necessary header file for input/output operations.

Output of the C Program:

Please enter an integer > 3
The square of 3 is 9
The square of 7 is 49
Please enter an integer > 4
The value of square3() is 16
The value of square4(5) is 25
The value of area(3,7) is 21