Write the function ADD having as parameters STR1 and STR2 which copies the string STR2 to the end of the string STR1.

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

void ADD(char STR1[], char STR2[])
{
	int i = 0 , j=0;
	while (STR1[i]) /* go to the end of STR1 */
		i++;
	while (STR2[j]) /* copy STR2 to the end of STR1 */
	{
		STR1[i] = STR2[j];
		i++;
		j++;
	}
	STR1[i] = '\0'; /* terminate STR1 */
}

void main()
{
	char str1[100], str2[100];
	printf("Enter a string: ");
	gets(str1);
	printf("Enter a string: ");
	gets(str2);
	ADD(str1,str2);
	puts(str1);

	getch();
}