code not running as expected in VS Code but working in other IDE

Question

#include <stdio.h>
#include <conio.h>

main()
{
    int LA[] = {1, 3, 5, 7, 8};
    int item = 10, k = 3, n = 5;
    int i = 0, j = n;

    printf("The original array elements are :\n");

    for (i = 0; i < n; i++)
    {
        printf("LA[%d] = %d \n", i, LA[i]);
    }

    n = n + 1;

    while (j >= k)
    {
        LA[j + 1] = LA[j];
        j = j - 1;
    }

    LA[k] = item;

    printf("The array elements after insertion :\n");

    for (i = 0; i < n; i++)
    {
        printf("LA[%d] = %d \n", i, LA[i]);
    }
}

I have tried copying the code in other IDEs it worked but is not working in VS Code can someone help me i am new to stackoverflow

Answer 1

For starters there is noting from C++ in your program.

Your program is a C program.

At least in C++ the headers should be

#include <cstdio>
#include <cconio>

instead of

#include <stdio.h>
#include <conio.h>

The array has the fixed size equal to 5. It can not store 6 elements.

If you want to insert a new value in the array then the value stored in the last element will be lost.

So these statements

n = n + 1;

while (j >= k)
{
    LA[j + 1] = LA[j];
    j = j - 1;
}

do not make sense and lead to undefined behavior.

The program can look like

int a[] = { 1, 3, 5, 7, 8 };
const size_t N = sizeof( a ) / sizeof( *a );

printf( "The original array elements are: " );

for ( size_t i = 0; i < N; i++ )
{
    printf( "a[%zu] = %d ", i, a[i] );
}
putchar( '\n' );

int item = 10;
size_t pos = 3;

if ( pos < N )
{
    for ( size_t i = N; pos < --i; )
    {
        a[i] = a[i-1]; 
    }
    a[pos] = item;
}

printf( "The array elements after insertion: " );

for ( size_t i = 0; i < N; i++ )
{
    printf( "a[%zu] = %d ", i, a[i] );
}
putchar( '\n' );

Pay attention to that instead of the for loop that moves values of the array to the right you could use C function memmove.

In C++ you could use standard container std::vector instead of the array.