C Program to Concatination of two string without use of any predefined function:

This is string concatination program in which we take to character array and take input from user.
we will concat two string without altered the actual.
For Example:
String1= hello
String2= world
after concatination it will become "helloworld"

ALGORITHM:-

step 1 : Start
step 2 : Take two character array
step 3 : Enter the string in each array
step 4 : Concate the first string with second string
step 5 : Print the final result
step 6 : Stop execution

PROGRAM CODE:-

#include<stdio.h>
#include<conio.h>

void main()
{
    int i=0,j=0;
    //there we take two character array
    char string1[20],string2[20];
    puts("Enter first string");
    gets(string1);
    puts("Enter second string");
    gets(string2);
    printf("Before concatenation the strings are\n");
    puts(string1);
    puts(string2);
    while(string1[i]!='\0')
    {
        i++;
    }
    while(string2[j]!='\0')
    {
        string1[i++]=string2[j++];
    }
    string1[i]='\0';
    printf("After concatenation the strings are\n");
    puts(string1);
    getch();
}

OUTPUT:-

Enter first string:
hello
Enter Second string:
world
Before Concatenation the string are:
hello
world

After Concatenation the string are:
helloworld

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Unknown Saturday, March 28, 2015

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SK Sitaram is a computer engineering. He has completed Advance Diploma in Software Engineering.
He is Founder and Developer of C Programming Simply. He loves researching in the IT field.
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