Matrix in snake pattern

Q41_Snake_pattern.cpp

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+#include<iostream>
+using namespace std;
+// Print matrix in snake pattern
+int main()
+{
+	int n,m,i,j;
+	cout<<"Enter the count of row and column matrix: ";
+	cin>>m>>n;
+	int arr[m][n];
+	for(i=0;i<m;i++) //Rows
+	{
+		for(j=0;j<n;j++) //columns
+		{
+			cin>>arr[i][j];
+		}
+	}
+	cout<<"Snake pattern: ";
+	for(i=0;i<m;i++) 
+	{
+		if(i%2==0) //If row is even then print as it is.
+			for(j=0;j<n;j++)
+				cout<<" "<<arr[i][j];
+		else
+			for(j=n-1;j>=0;j--) //If row is odd then print it in reverse format.
+				cout<<" "<<arr[i][j];
+	}
+	return 0;
+}
+

Q42_Decimal_to_Binary.cpp

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+#include <iostream> 
+using namespace std; 
+
+// Program to convert decimal to binary 
+void dectobin(int n) 
+{ 
+	// array to store binary number 
+	int binaryNum[64]; 
+	// counter for binary array 
+	int i = 0; 
+	while (n > 0)
+	{ 
+		// storing remainder in binary array 
+		binaryNum[i] = n % 2; 
+		n = n / 2; 
+		i++; 
+	} 
+	// printing binary array in reverse order 
+	for (int j = i - 1; j >= 0; j--) 
+		cout << binaryNum[j]; 
+}
+int main() 
+{ 
+	int n;
+    cout<<"Enter the Decimal value: ";
+    cin>>n;
+    cout<<"Binary value : ";
+    dectobin(n); 
+}