Tính tổng các số nguyên tố - C/C++

#include<math.h>

#include<conio.h>

#include<stdio.h>

#include<stdlib.h>

unsigned  n,i,j,ngto,dem=0,a[200];

inline void    nhap()

{printf("*************************************");

    printf("\nCHUONG TRINH TINH TONG CAC SO NGUYEN TO NHO HON 50");

    printf("\n*************************************");

    printf("\n Nhap vao so phan tu cua mang (Nho hon 50) :  ");

    scanf("%u",&n);

    printf("\n Nhap phan tu cua mang \n");

    for(i=0;i<n;i++)

    {

        printf("\n a[%u] = ",i);

        scanf("%u",&a[i]);

    }

}

inline void    nguyento()

{

    int sum=0;

    for(i=0;i<n;i++)

    {

        ngto=1;

        if(a[i]<2) ngto=0;

        for(j=2;j<=sqrt(a[i]);j++)

        if(a[i]%j==0) ngto=0;

            if(ngto)

                {

                    dem++;

                    sum += a[i];

                }

    }

    if(dem)

        printf("\nTong cac so nguyen to la = %d\n",sum);

    else

        printf("\nKhong co so nguyen to nao\n");

}

main()

{

    nhap();

    nguyento();

    getche();

}