31.10.2014

#Demo.

// Functie.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include<iostream>
#include<conio.h>


int nrcf( long n){
    int nr=0;
    while(n){
        n=n/10;
        nr++;
    }
    return nr;
}
int _tmain(int argc, _TCHAR* argv[])
{
    long n;
    printf("n=");
    scanf("%ld",&n);
    printf("Numarul %ld are %d cifre \n", n,nrcf(n));
    getch();
    return 0;
}

***************************************
#2.

// Functia2.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include<iostream>
#include<conio.h>

int cifra(int n, int c){
    while(n){
        if(n%10==c)
            return 1;
        else
            n=n/10;
    }
}

int _tmain(int argc, _TCHAR* argv[])
{
    int n,c;
    printf("n=");
    scanf("%d",&n);
    printf("c=");
    scanf("%u",&c);
    if(cifra(n,c)==1)
        printf("DA");
    else
        printf("NU");
    getch();
    return 0;
}

// Prim.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include<iostream>
#include<conio.h>
#include<math.h>


int prim(int n){
    int x=1;
    for(int i=2;i<=sqrt(n);i++)
        if(n%i==0)
            x=0;
    return x;
}

int main()
{
    int n;
    scanf("%d",&n);
    prim(n);
    if(prim(n)==1)
        printf("Numarul %d este prim", n);
    else
        printf("Numarul %d nu este prim", n);
    getch();
    return 0;
}