C Program to concatenate two strings without using inbuilt function strcat()

# include<stdio.h>

# include<conio.h>

void main()

{

 int i,j,k=0;

 char str1[50],str2[50],str3[50];

 clrscr();

 printf("\nEnter a string: ");

 scanf("%s",str1);

  printf("\nEnter a string: ");

  scanf("%s",str2);

  for(i=0;str1[i]!='\0';i++)

  {

 

   str3[i]=str1[i];

  }

 

 

  for(j=i;str2[k]!='\0';j++)

  {

  str3[j]=str2[k];

  k++;

  }

   for(i=0;i<j;i++)

   printf("%c",str3[i]);

 

 

 

 getch();

}

 

/* Output

 

Enter a string: TOM

 

Enter a string: JERRY

TOMJERRY

*/