implemented LD macro

src/userinput.c

@@ -7,6 +7,15 @@
 #include <math.h>
 #include <stdbool.h>
 
+#define LD(name)\
+    long double name##ldvalue;\
+    long double *name##ld = NULL;\
+    if (name != NULL) {\
+        name##ldvalue = *name;\
+        name##ld = &name##ldvalue;\
+    }
+
+
 void trimLeft(char *input) {
     size_t length = strlen(input);
     int firstIndex = 0;