TPS 4: Branching

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// Purpose: Solves for y in y=mx*b.
#include <iostream>
using namespace std;

int main(){
    float m, x, b, y;

    // Get the user's input.
    cout << "Please enter m, x, and b (separated by spaces): ";
    cin >> m >> x >> b;

    // Solve for y.
    y = m * x + b;

    // Output result.
    cout << "y = " << y << endl;

    return 0;
}

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// Purpose: Solves for x or y in y=mx*b.
#include <iostream>
using namespace std;

int main(){
    char varToSolveFor;
    float m, x, b, y;

    // Find out what the user wants to solve for.
    cout << "Which would you like to solve for, [x] or [y]? ";
    cin >> varToSolveFor;

    // Solve for y.
    if(_____________){
        // Get the user's input.
        cout << "Please enter m, x, and b (separated by spaces): ";
        cin >> m >> x >> b;

        // Solve for y.
        y = m * x + b;

        // Output result.
        cout << "y = " << y << endl;
    
    // Solve for x.
    } else if(_____________){
        // Get the user's input.
        cout << "Please enter m, y, and b (separated by spaces): ";
        cin >> m >> y >> b;

        // Solve for x.
        x = (y-b)/m;

        // Output result.
        cout << "x = " << x << endl;

    // Invalid input.
    } else {
        cout << "Invalid option." << endl;
    }

    return 0;
}