Write a program to print a String and a another String and connect it in c

#include
#include
main()
{
char string1[20],string2[20],string3[40];
int i,j,k;
int len=0;
clrscr();
printf("Enter a string:");
gets(string1);
printf("Enter Another string:");
gets(string2);
for(i=0;string1[i]!='\0';i++)
{
string3[i]=string1[i];
len++;
}
for(j=len,k=0;string2[k]!='\0';j++,k++)
{
string3[j]=string2[k];
}
string3[j]='\0';
printf("The concatenated string is:%s",string3);
getch();
}

OUTPUT
Enter a string:MAHESH
Enter Another string: SOLANKI
The concatenated string is : MAHESHSOLANKI