Answer:
The cpp program is given below.
#include <stdio.h>
#include <iostream>
using namespace std;
//function for cubing declared
double cubeValue(double n);
int main()
{
//variable to hold user input
double num;
std::cout <<"Enter a number to be cubed: ";
cin>>num;
//variable to hold cube
double cube;
//function returns cube
cube = cubeValue(num);
std::cout <<"The cube of " <<num <<" is "<<cube <<std::endl;
return 0;
}
//function to compute cube of the given parameter
//function definition
double cubeValue(double n)
{
double d;
d = n*n*n;
return d;
}
OUTPUT
Enter a number to be cubed: 3.4
The cube of 3.4 is 39.304
Explanation:
1. The function for cubing is declared in the beginning of the program. The function has double return type as well as takes a double parameter. The function is defined after the main() method. The function only returns the cube of the double parameter passed to it.
double cubeValue(double n);
2. Inside main(), user input is taken for the number whose cube is to be computed.
3. The user input is taken in variable, num.
4. Another double variable, cube, is declared.
5. The method, cubeValue(), is called by passing variable num as parameter.
6. The value returned by the method, cubeValue() is assigned to the variable, cube.
cube = cubeValue(num);
7. The cube is displayed to the user using cout.
8. The program ends with return statement.
return 0;
The return statement assures successful execution of the program.
The program may not contain any syntax errors but contain logic errors which is indicated by the error message. The error message is displayed in red with return value -1.
9. The program is saved as cubeValue.cpp.
10. The method, cubeValue(), does not takes user input and does not prints any message.
11. The code is not written inside the class. The program contains only two methods.
12. The program can be tested for both integer and double values.
13. The program is written in cpp as per the requirements.
