#include <stdio.h>


// Define a function that takes an integer as an argument and returns its square

int square(int x) {

    return x * x;

}


// Define a function that takes an integer as an argument and returns its cube

int cube(int x) {

    // Call the square function within the cube function

    int x_squared = square(x);

    return x_squared * x;

}


int main(void) {

    // Call the cube function and print the result

    int result = cube(3);

    printf("The cube of 3 is %d\n", result);


    return 0;

}

This program defines two functions: square, which takes an integer as an argument and returns its square, and cube, which takes an integer as an argument and returns its cube. The cube function calls the square function to calculate the square of the input value before calculating the cube.

Here is an example of the output of this program:

The cube of 3 is 27