//Code C++ In One Day Chapter3
//C++ In One Day: The Ultimate Beginners Guide To C++ With 7 Awesome Projects by Ean, W.B. 

#include <iostream> 
#include <cmath> 

using namespace std;

// Declaring the function used, not included in the book
// If omitted, then the whole function block must reside here
void arithmetic();
void trigonometric(); 
void exponential(); 
void logarithmic();  

int main() 
{  
    int sel = 0;  
    cout << "ADVANCED CALCULATOR\n"; 
    cout << "ENTER THE TYPE OF OPERATION YOU WANT TO CALCULATE\n";  
    cout << "[1] Arithmetic\n";  
    cout << "[2] Trigonometric\n";
    cout << "[3] Exponential\n";  
    cout << "[4] Logarithmic\n";  
    cout << "Your choice: ";  
    cin >> sel;  
    
    switch(sel)  
    {  
        case 1:  
            arithmetic(); 
            break; 
        case 2:  
            trigonometric();  
            break;  
        case 3:  
            exponential();  
            break;  
        case 4:  
            logarithmic();  
            break;  
        default:  
            cout << "invalid operation";
    } 
    system("sleep 5");
    return 0; 
}

 void arithmetic() 
 {  
    int op=0;  
    float A=0;  
    float B=0;  
    cout << "Select operation\n";  
    cout << "[1] Addition\n";  
    cout << "[2] Substraction\n";  
    cout << "[3] Product\n";  
    cout << "[4] Division\n";  
    cin >> op;
    cout << "Enter first number: ";  
    cin >> A; 
    cout << "Enter second number: ";  
    cin >> B;  cout << "Result: ";  
    switch(op)  
    {  
        case 1:  
            cout << (A+B); 
            break;  
        case 2:  
            cout << (A-B); 
            break;  
        case 3:  
            cout << (A*B); 
            break; 
        case 4:  
            cout << (A/B); 
            break;  
        default: 
            cout << "Invalid operation";  
            break;  
    }  
    cout << endl;
    
} 

void trigonometric() 
{  
    int op = 0; 
    float val = 0.0;  
    cout << "Select\n";  
    cout << "[1] Sine\n";  
    cout << "[2] Cosine\n";  
    cout << "Op: ";  
    cin >> op;  
    cout << "Enter value: ";  
    cin >> val;

    if(op==1)  
    {  
        cout << sin(val);  
    }  
    else if(op==2)  
    { 
        cout << cos(val);  
    }  
    else  
    {  
        cout << "Invalid operation";  
    }  
    cout << endl; 
} 

void exponential() 
{  
    float base=0.0;  
    float eee=0.0;

    cout << "Enter base: ";  
    cin >> base;  
    cout << "Enter expnent: "; 
    cin >> eee;  
    cout << pow(base, eee) << endl; 
} 

void logarithmic() 
{  
    float value=0.0;  
    cout << "Enter value for calculate the log(e): ";  
    cin >> value;  
    cout << log(value) << endl;  
}