/*
@Author: Vinod Selvin
@Desc: Analog Clock source code.
*/

#include <graphics.h> 
#include <stdlib.h> 
#include <stdio.h>
#include <conio.h>
#include <math.h> 
#include <dos.h> 
#include <process.h>



// Function to draw a rectangle
void drawRectangle(int x1, int y1, int x2, int y2) {
    rectangle(x1, y1, x2, y2);
}

// Function to translate (move) a rectangle
void translateRectangle(int *x1, int *y1, int *x2, int *y2, int tx, int ty) {
    *x1 += tx;
    *y1 += ty;
    *x2 += tx;
    *y2 += ty;
}

int main() {
    // Initialize the graphics system
    int gd = DETECT, gm;
    initgraph(&gd, &gm, "");

    // Define initial rectangle coordinates
    int x1 = 100, y1 = 100, x2 = 200, y2 = 200;

    // Draw the initial rectangle
    drawRectangle(x1, y1, x2, y2);

    // Wait for user input before translating
    getch();

    // Define translation offsets
    int tx = 50, ty = 50;

    // Translate the rectangle
    translateRectangle(&x1, &y1, &x2, &y2, tx, ty);

    // Clear the screen
    cleardevice();

    // Draw the translated rectangle
    drawRectangle(x1, y1, x2, y2);

    // Wait for user input before closing the graphics window
    getch();
    closegraph();
    return 0;
}
by

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About C

C language is one of the most popular general-purpose programming language developed by Dennis Ritchie at Bell laboratories for UNIX operating system. The initial release of C Language was in the year 1972. Most of the desktop operating systems are written in C Language.

Key features:

  • Structured Programming
  • Popular system programming language
  • UNIX, MySQL and Oracle are completely written in C.
  • Supports variety of platforms
  • Efficient and also handle low-level activities.
  • As fast as assembly language and hence used as system development language.

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);

Arrays

Array is a collection of similar data which is stored in continuous memory addresses. Array values can be fetched using index. Index starts from 0 to size-1.

Syntax

One dimentional Array:

data-type array-name[size];

Two dimensional array:

data-type array-name[size][size];

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.

Two types of functions are present in C

  1. Library Functions:

Library functions are the in-built functions which are declared in header files like printf(),scanf(),puts(),gets() etc.,

  1. User defined functions:

User defined functions are the ones which are written by the programmer based on the requirement.

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
}