#include <stdio.h>
#include <windows.h>

void display_border();

COORD c = {0, 0};
void setxy (int x, int y)
{
 c.X = x; c.Y = y; // Set X and Y coordinates
 SetConsoleCursorPosition(GetStdHandle(STD_OUTPUT_HANDLE), c);
}

int main() 
{ 
 int batx=15,baty=13, ballx=25, bally=7;
 int x=25, y=10, ch1, ch2, b;
  
 setxy(14,1);
 printf("...Find The Ball...") ;
 display_border();
 
 setxy(batx, baty);
 printf("===");
 
 setxy(ballx, bally);
 printf("%c",2);
 
 ch1 = getch(); 
 ch2 = 0;

/*When accepting arrow key, function must be called twice; first call returns 0/0xE0; second call returns actual key code.*/
  
 if (ch1 == 0xE0) 
 {  
   while(ch2=getch())
   {
  if(ch2 == 'X') exit(0);
  if(ch2 == 75)//Left
  {
    if(batx>11) //Restrict bat on left side wall
    {
   setxy(--batx,baty);
   printf("===");     
   setxy(batx+3,baty);//Space to clear bat route
   printf(" ");
    }
  }
    if(ch2 == 77) //Right
    {
   if(batx<37)//Restrict bat on right side wall
   {
      setxy(++batx,baty);
     printf("===");
     setxy(batx-1,baty);//Space to clear bat route
     printf(" ");
   }
    }   
    if(ch2 == 72) //Up
    {
   if(baty>6)
   {
     setxy(batx,--baty);
     printf("===");
     setxy(batx,baty+1);
     printf("   ");
   } 
    }
    if(ch2 == 80) //Down
    {
   if(baty<14)
   {
     setxy(batx,++baty);
     printf("===");
     setxy(batx,baty-1);
     printf("   ");
   } 
    }
    if(batx==ballx-1 && baty==bally)
    {
   setxy(ballx-9,bally+4);
   printf("...Congratulations...");
   setxy(ballx-9,bally+5);
   printf("  ...Ball Found..");
   setxy(ballx-9,bally+6);
   printf("   ...Game Over..");
   getch();
   exit(0);
    }    
  }
 } 
 getch();
 return 0; 
}

void display_border()
{
 int i, j;
 //Top border line...
 setxy(10,5); 
 for(j=0; j<30; j++)
  printf("%c", 223);
 
 //Bottom border line... 
 setxy(10,15);
 for(j=0; j<=30; j++)
  printf("%c", 223);
 
 //Left and Right border line...
 for(j=0; j<10; j++)
 {
  setxy(10,5+j);
  printf("%c",219);
  
  setxy(40,5+j);
  printf("%c",219);
 }
 printf("\n");
}
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
}