How to Concatenate Two Strings with STRCAT

Like numbers you can also concatenate strings or paragraphs. There are several methods for concatenation but I am simplifying two out of all. One is with strcat function and other is by using arrays.

/*Concatenate Two Strings with StrCat Function*/

#include<stdio.h>

#include<conio.h>

main()

{

    clrscr();

    char a[100], b[100];

    printf("\nEnter First String:\n");

    gets(a);

    printf("\nEnter Second String:\n");

   gets(b);

   strcat(a,b);

   printf("\nString After Concatenation:: \n\n%s",a);

  getch();

}

/*Concatenate Two Strings without StrCat*/

 #include<stdio.h>
 #include<string.h>
 #include<conio.h>
int main()
{
  clrscr();
  int i=0,j=0;
  char str1[20],str2[20];
  puts("Enter first string");
  gets(str1);
  puts("Enter second string");
  gets(str2);
  printf("Before concatenation the strings are\n");
  puts(str1);
  puts(str2);
  while(str1[i]!='\0'){
      i++;
  }
  while(str2[j]!='\0'){
      str1[i++]=str2[j++];
  }
  str1[i]='\0';
  printf("After concatenation the strings are\n");
  puts(str1);
 return 0;
}