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Link: http://codepad.org/6vi3oR91    [ raw code | output | fork | 2 comments ]

C, pasted on Sep 15:
#include<stdio.h>
#include<conio.h>
#include<math.h>
#define MAX 100

void nhap (int a[], int &n)
{
	do
	{
		printf("\nNhap so phan tu: ");
		scanf("%d", &n);
		if(n <= 0 || n > MAX)
		{
			printf("\nSo phan tu khong hop le. Xin kiem tra lai !");
		}
	}while(n <= 0 || n > MAX);
	for(int i = 0; i < n; i++)
	{
		printf("\nNhap a[%d]: ", i);
		scanf("%d", &a[i]);
	}
}

void xuat(int a[], int n)
{
	for(int i = 0; i < n; i++)
	{
		printf("%4d", a[i]);
	}
}
// nguyên tố => true
bool KiemTraNguyenTo(int n)
{
	if (n < 2)
	{
		return false;
	}
	else if (n > 2)
	{
		if (n % 2 == 0)  // nếu là số chẵn
		{
			return false;
		}
		for (int i = 3; i <= sqrt((float)n); i += 2)   // kiểm tra các số lẻ
		{
			if (n % i == 0)
			{
				return false;
			}
		}
	}
	return true;
}

int demnguyento(int a[], int n)
{
	int dem = 0;
	for(int i = 0; i < n; i++)
	{
		if(KiemTraNguyenTo(a[i]) == true && a[i] < 100)
		{
			dem++;
		}
	}
	return dem;
}
int main()
{
	int n;
	int a[MAX];

	nhap(a, n);
	xuat(a, n);

	int dem = demnguyento(a, n);
	printf("\nSo luong cac so nguyen to la: %d", dem);
	
	getch();
	return 0;
}


Output:
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Line 17: error: conio.h: No such file or directory
Line 6: error: expected ';', ',' or ')' before '&' token
In function 'xuat':
Line 26: error: 'for' loop initial declaration used outside C99 mode
t.c: At top level:
Line 32: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'KiemTraNguyenTo'
In function 'demnguyento':
Line 58: error: 'for' loop initial declaration used outside C99 mode
Line 60: error: 'true' undeclared (first use in this function)
Line 60: error: (Each undeclared identifier is reported only once
Line 60: error: for each function it appears in.)


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Comments:
posted by luongphongnhan on Oct 25
#include <iostream>
using namespace std;
#define MAX 100
void nhapmang(int *arr, int &n) {
do
{
cout << "Moi nhap so phan tu cua mang: ";
cin >> n;
if (0 >= n > 100) {
cout << "Xin moi nhap lai, so phan tu cua mang khong hop le!";
}
} while (0 >= n > 100);
for (int i = 0; i < n; i++)
{
cout << "Moi nhap phan tu thu " << i << "cua mang: ";
cin >> arr[i];
}
}
void xuatmang(int *arr, int n) {
for (int i = 0; i < n; i++)
{
cout << arr[i] << " ";
}
cout << endl;
}

int demNguyenToo(int *arr, int n) {
int dem = 0;
int checkNguyento;
for (int i = 0; i < n; i++)
{
checkNguyento = 0;
for (int j = 1; j < arr[i]; j++)
{
if ((arr[i]) % j == 0) {
checkNguyento += 1;
}
}
if (checkNguyento == 1 && arr[i] <= 100) {
dem += 1;
}
}
return dem;
}

int main() {
int num;
int *Arr= new int[MAX];
nhapmang(Arr, num);
xuatmang(Arr, num);
cout << "So phan tu trong mang la so nguyen to va nho hon 100 la: " << demNguyenToo(Arr, num) << endl;
system("pause");
return 0;
}
reply
posted by 20223768 on Oct 11
#include <iostream>
using namespace std;
int demsonguyento(int a[], int n )
{
int count=0; int countnguyento=-1;
for (int i=0; i<n; i++)
{
if (a[i]==2 || a[i]==3) countnguyento++;
if (a[i]>3)
{
for (int j=2; j<a[i]; j++)
if (a[i]%j==0) count++;
if (a[i]<100 && count!=0) countnguyento++;
}
}
return countnguyento;
}
int main()
{
int a[1000]; int n;
do
{
cout << "Nhap so phan tu cua mang: " << endl;
cin >> n;
if (n<=0 || n >1000) cout << "So phan tu khong hop le, moi nhap lai: ";
} while (n<=0 || n>1000);
for (int i=0; i<n ; i++)
{
cout<< "Nhap phan tu cua mang: " ;
cin >> a[i];
}
int countnguyento=0;
countnguyento=demsonguyento(a,n);
cout << "So luong so nguyen to nho hon 100 trong mang la: " << countnguyento << endl;
return 0;
}
reply