/* COncate */

void main()
{
    char s1[100], s2[200];
    int i = 0, j = 0;
    clrscr();

    printf("Enter 1st string: ");
    gets(s1);

    printf("Enter 2nd string: ");
    gets(s2);

    while(s1[i] != '\0')
        i++;

    while(s2[j] != '\0')
        s1[i++] = s2[j++];

    s1[i] = '\0';

    printf("\nAfter concate: %s", s1);

    getch();
}