/* C program to read two strings and concatenate them (without using library functions). Output the concatenated string along with the given string */

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

void main()
{
char string1[20], string2[20];
int i,j,pos;

strset(string1, ‘\0′); /*set all occurrences in two strings to NULL*/
strset(string2,’\0′);

printf(“Enter the first string :”);
gets(string1);
fflush(stdin);

printf(“Enter the second string:”);
gets(string2);

printf(“First string  = %s\n”, string1);
printf(“Second string = %s\n”, string2);

/*To concatenate the second string to the end of the string
traverse the first to its end and attach the second string*/

for (i=0; string1[i] != ‘\0′; i++)
{
;      /*null statement: simply traversing the string1*/
}

pos = i;

for (i=pos,j=0; string2[j]!=’\0′; i++)
{
string1[i] = string2[j++];
}

string1[i]=’\0′;   /*set the last character of string1 to NULL*/

printf(“Concatenated string = %s\n”, string1);
}
/*—————————————
Output
Enter the first string :CD-
Enter the second string:ROM
First string  = CD-
Second string = ROM
Concatenated string = CD-ROM
—————————————-*/

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Tagged as: C program to read two strings and concatenate them (without using library functions). Output the concatenated string along with the given string, strings and concatenate them (without using library functions). Output the concatenated string along with the given string