Added RANDOM() function.

Operand.cpp

@@ -2,6 +2,7 @@
 #include "Exception.h"
 #include <format>
 #include <iostream>
+#include <time.h>
 
 namespace jet {
 
@@ -66,7 +67,10 @@ namespace jet {
       } else if(in.ifNext("ROUND")) {
 	 
       } else if(in.ifNext("RANDOM")) {
-	 
+	 unsigned int seed = (unsigned int)clock();
+	 doubleValue = (double) rand_r(&seed) / (RAND_MAX + 1.0);
+	 isNumber = true;
+	 string = std::format("{}", doubleValue);	 
       } else if(in.ifNext("true")) {
 	 boolean = true;
 	 string = "true";