[Solved] Expression Evaluation with C++

Expression Evaluation: In the Mini project, 7^th module is to evaluate the expression y = x + x^2+……..+x^n. Rita allotted this function to Malini. Collect and display the values returned by the called function. Test your program and report the results obtained.
Help Malini to write a program to evaluate the expression?

Get the value of x and n from the user as input

Function Specification:
int calculate(int,int);
where the first argument corresponds to the value of x and second corresponds to n.

Note:

Please use the same prompt statements given in the sample input and output

Input Format:
The first line of the input contains an integer x.
The second line of the input contains an integer n (n>=0).

Output Format:
Output displays an integer.
Note: If n = 0, print 1.
Refer sample input and output for formatting details.

[ All text in bold corresponds to Input and the rest output ]
Sample Input and Output:
Enter the value of x
2
Enter the value of n
3
The result is
14

Function Definitions:

int calculate (int,int)

Solution

#include <iostream>
#include <cmath>
using namespace std;
int calculate(int x, int n)
{
    int sum = 0;
    for (int i = 1; i <= n; i++)
    {
        sum = sum + pow(x, i);
    }
    return sum;
}

int main()
{
    int x, n;
    cout << "Enter the value of x\n";
    cin >> x;
    //sauravhathi
    cout << "Enter the value of n\n";
    cin >> n;
    cout << "The result is" << endl;
    if (n == 0)
    {
        cout << "1" << endl;
    }
    else if (n > 0)
    {
        cout << calculate(x, n) << endl;
    }
    return 0;
}

Happy Learning – If you require any further information, feel free to contact me.