getting the total put the two array values in one array without strcat in c++co code example

Example 1: concatenate two strings in c

#include <stdio.h>
#include <string.h>
int main()
{
  char a[1000], b[1000];

  printf("Enter the first string\n");
  gets(a);

  printf("Enter the second string\n");
  gets(b);

  strcat(a, b);

  printf("String obtained on concatenation: %s\n", a);

  return 0;
}

Example 2: how to concatenate two big strings without using strcat in c++

cin >> doubleNumber;
cin.ignore();  //ignores an end of line character 
getline(cin, stringName);