concatenate.c

#include<stdio.h>
#include<string.h>

int main ()
{
   char s1[300],s2[300],i,j;
   printf("enter first string:");
   gets(s1);
   printf("enter second string:");
   gets(s2);
for(i=0,j=0;s1[i]!='\0',s2[j]!='\0';i++,j++)
     {
         s1[i]=s2[j];
     }


    s1[i]='\0' ;

    printf("after concating : %s",s1[i]);

    return 0;
}