Program to concatenate one string into another string

Program

#include <stdio.h>
#include<string.h>
int main()
{
    char str1[20],str2[20],str3[40];
    int len;
    printf("************************************************************");
    printf("\n************************************************************");
    printf("\n**   WAP to concatenate one string into another string    **");
    printf("\n**              Created by Sheetal Garg                   **");
    printf("\n**              Assistant Professor                       **");
    printf("\n**              Phone No:9467863365                       **");
    printf("\n************************************************************");
    printf("\n************************************************************");
    printf("\nenter the string1\n");
    gets(str1);
    printf("\nenter the string2\n");
    gets(str2);    
    strcpy(str3,str1);
    strcat(str3,str2);
    printf("\nConcatenated string is %s", str3);
}

Output 1

************************************************************
************************************************************
**   WAP to concatenate one string into another string    **
**              Created by Sheetal Garg                   **
**              Assistant Professor                       **
**              Phone No:9467863365                       **
************************************************************
************************************************************
enter the string1
Sheetal

enter the string2
Garg

Concatenated string is SheetalGarg