#include<stdio.h>
char data[20],div[20],temp[4],total[100];
int i,j,datalen,divlen,len,flag=1;
void check();
int main()
{
	 printf("Enter the total bit of data:");
	 scanf("%d",&datalen);
	 printf("\nEnter the total bit of divisor");
	 scanf("%d",&divlen);
	 len=datalen+divlen-1;
	 printf("\nEnter the data:");
	 scanf("%s",data);
	printf("\nEnter the divisor");
	scanf("%s",div);

    for(i=0;i<datalen;i++)
    {
   	 total[i]=data[i];
   	 temp[i]=data[i];
    }
    for(i=datalen;i<len;i++)
    	total[i]='0';
    check();
	 for(i=0;i<divlen;i++)
     	 temp[i+datalen]=data[i];
	 printf("\ntransmitted Code Word:%s",temp);
    printf("\n\nEnter the received code word:");
	scanf("%s",total);
	 check();
    for(i=0;i<divlen-1;i++)
   	 if(data[i]=='1')
   	 {
   		 flag=0;
   		 break;
   	 }
    if(flag==1)
    printf("\nsuccessful!!");
    else
    printf("\nreceived code word contains errors...\n");
}
void check()
{
	for(j=0;j<divlen;j++)
    	data[j]=total[j];
    	while(j<=len)
    	{
        	if(data[0]=='1')
            	for(i = 1;i <divlen ; i++)
                	data[i] = (( data[i] == div[i])?'0':'1');
        	for(i=0;i<divlen-1;i++)
            	data[i]=data[i+1];
        	data[i]=total[j++];
    	}
}

C Language online compiler

Write, Run & Share C Language code online using OneCompiler's C online compiler for free. It's one of the robust, feature-rich online compilers for C language, running the latest C version which is C18. Getting started with the OneCompiler's C editor is really simple and pretty fast. The editor shows sample boilerplate code when you choose language as 'C' and start coding!

Read inputs from stdin

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

#include <stdio.h>
int main()
{
    char name[50];
    printf("Enter name:");
    scanf("%s", name);
    printf("Hello %s \n" , name );
    return 0;
    
}

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
}