#include <iostream>
#include "cstring" 
#include <cstdlib>
#include <conio.h>
using namespace std;
void decToBin(int);
void binToDec (char *);
int main(int argc, char *argv[]){
	if(argc != 3) {
		cout << "Using N 2 or N 10, 2/10 - number system. \nExample: 345 2" << endl;
		return -1;
	}
	int n = 0;
	if(atoi(argv[2])==2){
		decToBin(atoi(argv[1]));
	}
	cout << "You press not number..";
	if(atoi(argv[2])==10){
		binToDec(argv[1]);
	}
	cout << "Number system mb 2 or 10.";
	getch();
	return 0;
 
}
 
void decToBin(int num){
	int t=0;
	while(num){
        num=num/2;
        t=num%2;
        cout<<t;
    }
    cout<<endl;
}	
 
void binToDec (char * c) {
	int rez=0; 
	int a=1;  
	int len=strlen(c); 
 
	for(int j = 0, k = len; j < len; j++, k-- ) 	 
		if ( c[ j ] == '1' ) rez |= a << k - 1; 
	cout << rez;
};

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