Please slove it in c++,do not copy paste from net otherwise i will get zero

Question

Write a recursive function that converts a decimal number to binary number. int DecToBin(int dec);

Answer 1

using namespace std;

#include <iostream>

#include <math.h>

#define MAX_BITS (16)

void Dec2Bin(int n, char * binStr, int expo)

{

if (expo>0)

{

int P = pow(2,expo);

binStr[MAX_BITS-expo-1] = ((n/P)==1) ? '1' : '0';

//cout << " P = " << P << " : n = " << n << " expo = " << expo << " binstr=>" << binStr << "<" << endl;

Dec2Bin(n%P,binStr,--expo);

}

else

{

binStr[0]= (n==1) ? '1' :'0';

}

}

int main()

{

char binStr[MAX_BITS+1];

for (int iLoop=0; iLoop<MAX_BITS; iLoop++) { binStr[iLoop]='0'; } //memset(binStr,'0',MAX_BITS);

binStr[MAX_BITS]=0;

int n=100;

Dec2Bin(n,binStr,MAX_BITS-1);

cout << binStr << endl;

}