How to make Makefile?

Makefile_Assignment/common_math/common_math.c

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+/*
+ * =====================================================================================
+ *
+ *       Filename:  common_math.c
+ *
+ *    Description:  
+ *
+ *        Version:  1.0
+ *        Created:  04/02/24 07:32:41 PM IST
+ *       Revision:  none
+ *       Compiler:  gcc
+ *
+ *         Author:  YOUR NAME (), 
+ *   Organization:  
+ *
+ * =====================================================================================
+ */
+
+#include "common_math.h"
+#include <stdio.h>
+
+double add (double a, double b){return b + a;}
+double sub (double a, double b){return a - b;}
+double mul (double a, double b){return a * b;}
+double div (double a, double b){
+    if (b == 0){
+        printf("divide by zero not allowed\n");
+        return 0;
+    }
+    return a / b;
+}
+
+double max (double a, double b){
+    if(a > b) 
+        return a;
+    return b;
+}
+
+double min (double a, double b){
+    if(a > b)
+        return b ;
+    return a;
+}
+