Program to concatenate the given two strings

Program:

#include<stdio.h>
#include<conio.h>
void main()
{
    char str1[20], str2[20], strcon[40];
    int i, j;
    clrscr();
    printf("Enter the first string : ");
    scanf("%s", str1);
    printf("\nEnter the second string : ");
    scanf("%s", str2);
    for(i = 0; str1[i] != '\0'; i++)
    strcon[i] = str1[i];
    i--;
    for(j = 0; str2[j] != '\0'; j++)
    strcon[i + j + 1] = str2[j];
    strcon[i + j + 1] = '\0';
    printf("\nThe concatenation string is : %s", strcon);
    getch();
}

Output:

Enter the first string : Anna
Enter the second string : University
The concatenation string is : AnnaUniversity