program that converts decimal to binary

decimalToBinary.cpp

@@ -0,0 +1,16 @@
+#include <iostream>  
+using namespace std;  
+
+int main(){  
+    int a[10], n, i;
+    cin >> n;
+
+    for(i=0; n>0; i++){    
+        a[i] = n%2;
+        n = n/2;
+    }    
+
+    for(i=i-1 ;i>=0 ;i--){    
+        cout << a[i];    
+    }    
+}  

reverseNumber.c

@@ -0,0 +1,23 @@
+#include<stdio.h>
+
+int main(){
+   int num,revNum;
+
+   scanf("%d",&num);
+
+   revNum = reverse_function(num);
+   printf("\n%d", revNum);
+   return 0;
+}
+
+int sum = 0, rem;
+reverse_function(int num){
+   if(num){
+      rem = num%10;
+      sum = sum*10+rem;
+      reverse_function(num/10);
+   }
+   else
+      return sum;
+   return sum;
+}