#include<stdio.h>
int main()
{
	int i=0,len_ip=0,count;
	int len_op=0;
	int j=0,s=0,x=0,five=0;
	char ip[' '],op[' '],decode_op[' '];
	char pre_post[]={'0','1','1','1','1','1','1','0'};

	printf("Enter input bitsequence: \n");
	scanf("%s",ip);
	for(i=0;ip[i]!=0;i++) len_ip++;
/*Stuffing*/
	for(i=0;i<8;i++) op[i]=pre_post[i];
	count=i;
	do
	{
		if(ip[j]=='1') five++;
		else five=0;
		op[count]=ip[j];
		count++;
		j++;

		if(five==5)
		{
			op[count++]='0';
			five=0;
		}
	}while(j<len_ip);
	for(s=count,x=0;s<(count+8);s++,x++)
	{
		op[s]=pre_post[x];
	}
	printf("Output\n");
	printf(" ----- ");
	printf("\nStuffedBitSequence is:");
	op[s]=0;
	puts(op);
/*Destuffing*/
	j=0;
	five=0;
	len_op=count+8;
	i=8;
	do
	{
		decode_op[j++]=op[i];
		if(op[i]=='1') five++;
		else five=0;
		if(five==5)
		{
			i++;
			five=0;
		}
		len_op--;
		i++;
	}while((len_op-8)!=0);
	decode_op[len_ip]=0;
	printf("Destuffed BitSequence is:");
	puts(decode_op);
}
by

C Language online compiler

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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
}