#include <iostream>
#include "splashkit.h"
#include <string>
using namespace std;
#define STROUHAL 0.33

double air_speed(double freq, double amp)
{

}

void output_air_speed(string name, double freq, double amp)
{

}

string read_string(string prompt){
    
    
}



void test_user_details()
{
    string name;
    string line;
    int age;
    name = read_string("Tell me your name");
    line = read_string("How old are you?");
    age = convert_to_integer(line);
    write_line("Hi" + name);

    if (to_lowercase(name) =="anish")
    {
        write_line("When are we going to drink black milk tea Anish?");
        write_line("Tea is raady as soon as I complete my assignmet");

    }
    else if (to_lowercase(name) =="Bek")
    {
        write_line("Hey howdy?");
    }
    else
    {
        write_line("We are not yet know each other...");
    }

    write("Age: ");
    write_line(age);
}
void play_guess_that_number()
{
    string line;
    int guess;
    int target;

    target = rnd(100)+1;
    write_line("Guess my number between 1 to 100 ");

    while ( guess != target )
    {
        write("Enter the number: ");
        line = read_line();
        guess = convert_to_integer(line);
        if (guess < target)
        {
            write_line("Ooops, my number is greater than " + to_string(guess));
    
        }
        else if (guess > target)
        {
            write_line("Ooops, go less than " + to_string(guess));
        }
    }
    write_line("Congrats, you guessed my number " + to_string(target));

}
int main()
{
    string line;
    int option;

    do
    {
        write_line("1: Tell me your name");
        write_line("2: Calculate air speed");
        write_line("3: Guess that number");
        write_line("4: Quit");

        write("Select one: ");
        line = read_line();
        option = convert_to_integer(line);

        switch (option)
        {
            case 1:
                write_line(" Tell me your name");
                test_user_details();
                break;
            case 2: 
                output_air_speed("African Swallow", 15, 0.2);
                output_air_speed("Tree Swallow", 32, 2);
                break;
            case 3:
                play_guess_that_number();
                break;
            case 4:
                write_line("Bye");
                break;
            default:
                write_line("Choose one from the above");
        }


    }
    while (option != 4);
    return 0;
}
by

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Read inputs from stdin

OneCompiler's C++ online compiler supports stdin and users can give inputs to programs using the STDIN textbox under the I/O tab. Following is a sample program which takes name as input and print your name with hello.

#include <iostream>
#include <string>
using namespace std;

int main() 
{
    string name;
    cout << "Enter name:";
    getline (cin, name);
    cout << "Hello " << name;
    return 0;
}

About C++

C++ is a widely used middle-level programming language.

  • Supports different platforms like Windows, various Linux flavours, MacOS etc
  • C++ supports OOPS concepts like Inheritance, Polymorphism, Encapsulation and Abstraction.
  • Case-sensitive
  • C++ is a compiler based language
  • C++ supports structured programming language
  • C++ provides alot of inbuilt functions and also supports dynamic memory allocation.
  • Like C, C++ also allows you to play with memory using Pointers.

Syntax help

Loops

1. If-Else:

When ever you want to perform a set of operations based on a condition If-Else is used.

if(conditional-expression) {
   //code
}
else {
   //code
}

You can also use if-else for nested Ifs and If-Else-If ladder when multiple conditions are to be performed on a single variable.

2. Switch:

Switch is an alternative to If-Else-If ladder.

switch(conditional-expression){    
case value1:    
 // code    
 break;  // optional  
case value2:    
 // code    
 break;  // optional  
......    
    
default:     
 code to be executed when all the above cases are not matched;    
}

3. For:

For loop is used to iterate a set of statements based on a condition.

for(Initialization; Condition; Increment/decrement){  
  //code  
}

4. While:

While is also used to iterate a set of statements based on a condition. Usually while is preferred when number of iterations are not known in advance.

while (condition) {  
// code 
}

5. Do-While:

Do-while is also used to iterate a set of statements based on a condition. It is mostly used when you need to execute the statements atleast once.

do {  
 // code 
} while (condition);

Functions

Function is a sub-routine which contains set of statements. Usually functions are written when multiple calls are required to same set of statements which increases re-usuability and modularity. Function gets run only when it is called.

How to declare a Function:

return_type function_name(parameters);

How to call a Function:

function_name (parameters)

How to define a Function:

return_type function_name(parameters) {  
 // code
}