Reading and writing of string using character array.

Reading and writing of string using character array.:- 

for Reading and writing of string using character array In c programming language provides a separate Access specifier i.e. %S to read and write sequence of characters of a string .

Following is the example of reading sequence  of character using ‘ %S ‘ Access specifier.

Example:  Char name [12 ];

Read / Input string:-  

Write / output  string:-  

The drawback of the %s Access specifier is that it stops reading the input as soon as it encounters a whitespace ( Normal space , Tab space etc. ) 

Note:-  There is another built in function  provide by c which can read the input character sequence that include whitespaces too.   

There is also another built in function for printing the string which is puts . by using puts we can easily display the input string .

/* Program to find the length of an input string */

Code:-

#include<stdio.h>
int main()
{
   char s[]="CrackAlgo";
   int len=0,i;
   for(i=0;s[i]!='\0';i++)
   {
      len++;
   }
   printf("Length of the string is %d",len);
   return 0;
}

Length of the string is 9

#include<stdio.h>
int main()
{
   char s[50];
   int len=0,i;
   printf("Enter the string\n");
   scanf("%s",s);
   for(i=0;s[i]!='\0';i++)
   {
     len++;
   }
   printf("Length of the string is %d",len);
   return 0;
}

 There are many way to take input of the string .

2)  scanf(“%[^\n]”,string_name):-

Code:-

#include<stdio.h>
#include<string.h>
int main()
{
    char bin[100];
    int word=0;
    printf("Enter a sentence\n");
    scanf("%[^\n]",bin);
    printf("The output is:-\n");
    puts(bin);
    return 0;
}

Output:-

Enter a sentence
This is Crackalgo
The output is:-
This is CrackAlgo

3) gets(string_name):-

Code:-

#include<stdio.h>
#include<string.h>
int main()
{
    char bin[100];
    int word=0;
    printf("Enter a sentence\n");
    gets(bin);
    printf("The output is:-\n");
    puts(bin);
    
    return 0;
}

Output:-

Enter a sentence
This is CrackAlgo
The output is:-
This is CrackAlgo

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Key points:-

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Array and string:-

• Is Unique
  
• Check Permutation
  
• Urlify
  
• One away
  
• String Compression
  
• Zero matrix
  

Tree and graph:-

Hackerearth Problems:-

•  Playing With Characters | Hackerrank practice problem solution
• Sum and Difference of Two Numbers | hackerrank practice problem solution
  
• Functions in C | hackerrank practice problem solution
  
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• Conditional Statements in C | Hackerrank practice problem solution
  
• For Loop in C | hackerrank practice problem solution
  
• Sum of Digits of a Five Digit Number | hackerrank practice problem solution
  
• 1D Arrays in C | hackerrank practice problem solution
  
• Array Reversal | hackerrank practice problem solution
  
• Printing Tokens | hackerrank practice problem solution
  
• Digit Frequency | hackerrank practice problem solution
  
• Calculate the Nth term | hackerrank practice problem solution

Data structure:-

•   Program to find cycle in the graph
• Implementation of singly link list
• Implementation of queue by using link list
• Algorithm of quick sort
• stack by using link list
• program to find preorder post order and inorder of the binary search tree
• Minimum weight of spanning tree
• Preorder, inorder and post order traversal of the tree

 MCQs:-