binary number using the concept of dynamic memoric allocation

Author: shrikantpadhy18

Algorithms/Maths/Base Conversion/binary_number/check_multple_of3.c

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+#include<stdio.h>
+#include<conio.h>
+#include<math.h>
+
+int checking(char*,int);
+void main()
+    {
+        int b,i;
+        char *a;
+        a=(char*)calloc(b,sizeof(char));
+        printf("\nhow many digit binary you want to enter\n");
+        scanf("%d",&b);
+
+        printf("\nenter the binary number");
+        fflush(stdin);
+        gets(&a[0]);
+        if(checking(a,b))
+        {
+            printf("\nthe given binary number after converting into decimal is a multiple of 3");
+        }
+        else
+         printf("\nthe given binary number after converting into decimal is not a multiple of 3");
+         getch();
+        free(a);
+    }
+    int checking(char *a,int b)
+    {
+        int i,j=0,sum=0;
+
+        for(i=b-1;i>=0;i--)
+        {
+            sum=sum+pow(2,j)*(int)*(a+i);
+            j++;
+        }
+        return(sum%3==0);
+    }

Algorithms/Maths/Base Conversion/binary_number/readme.md

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+This program ask the user to enter the number of dits in a binary number and then wants the the user to enter that number and then checks whether the entered binary number is a multiple of 3 or not.