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I have been developing a cross-platform game based on open C libraries (mainly glfw) with a direct focus on Windows development. The beginning of my programming career taught me familiarity in Objective-C, however I've been using pure C for the past few years in embedded applications.

Now that I'm trying to return to proper desktop program development, I'm wondering if it's a good idea to transfer my Objective-C skills to Windows in order to tidy up my C code. My current way of programming is creating a struct for data that I need and then creating functions around those structs: struct Point int x, int y; and then float Point_calculateDistance(struct Point *obj1, struct Point *obj2). This approach to me seemed very redundant and too object-oriented to write all in C. It would make more sense to me to write an Objective-C class to do this where everything can be more encapsulated.

I prefer not to use any framework for my code to increase the portability. I'm currently using VS Code and MSYS2 (mingw64) with GCC 8.3.0. I threw together a working example that demonstrates how I attempt to build a simple class. Does my code look reasonable? Am I performing any bad habits (within reason considering that I'm not using a framework)? Does this currently leak memory? Let me know what you think.

#include <objc/objc.h>
#include <objc/runtime.h>
#include <objc/Object.h>
#include <stdio.h>
#include <stdlib.h>


@interface Test : Object 
 int value;

+(const char *)classStringValue;
-(void)incrementBy: (int)num;
@end

@implementation Test
+(id)alloc 
 id obj = malloc(class_getInstanceSize(self));
 object_setClass(obj, self);
 return obj;


-(void)dealloc 
 free(self);


-(id)init 
 value = 0;
 return self;


+(const char *)classStringValue 
 return "This is the string value of the Test class";


-(const char *)integerString 
 if (value >= 5) 
 return "high";
 else 
 return "low";
 


-(void)incrementBy: (int)num 
 value += num;

@end

int main(int argc, char **argv) 
 printf("%sn", [Test classStringValue]);
 Test *testobj = [[Test alloc] init];

 printf("%sn", [testobj integerString]);
 [testobj incrementBy: 5];
 printf("%sn", [testobj integerString]);

 printf("%dn", (int)[testobj class]);
 printf("%dn", (int)[Object class]);
 printf("%dn", [Object isEqual: testobj]);
 printf("%dn", [testobj isEqual: testobj]);

 [testobj dealloc];
 return EXIT_SUCCESS;