C program to concatenated string using pointer | My CS Tutorial

String concatenation in C,C program to concatenate two string using pointer.

In this tutorial we will learn how to write a c program that concatenate two strings by use of pointer.

We will enter two string like first string is - Hello and second string is - Friends,

then the output concatenated string is - Hello Friends

C PROGRAM CODE

#include<stdio.h>

main()

{

  char s1[25],s2[25],*t1,*t2;

  int len1=0,len2=0,i;

  

  printf("\n ENTER FIRST STRING:\n ");

  scanf("%s",&s1);

  

  printf("\n ENTER SECOND STRING:\n ");

  scanf("%s",&s2);

  

  t1=s1;

  

  //copying base address of string

  

  t2=s2;

  while(*t1!='\0')

  {

   t1++;

   len1++;

  }

  

 //copying second string to first

  while(*t2!='\0')

  {

   *t1=*t2;

   t1++;

   t2++;

   len2++;

  }

  *t1='\0';

  i=0;

  

  //taking total string to initial base address

  

  while(i<len1+len2)

  {

   i++;

   t1--;

  }

    printf("\n CONCATENATED STRING:\n ");

    while(*t1!='\0')

    {

     printf("%c",*t1);

     t1++;

    }

printf("\n ");

}

OUTPUT:

Output of concatenated string 

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Created by-- HARSH CHAUHAN