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int num_of_pages = size / PAGE_SIZE ;
	num_of_pages= ROUNDUP(num_of_pages,PAGE_SIZE);
	uint32 min=9999;
	struct Frame_Info* ptr_frame_info;
	int num_of_pages_Kheap = (KERNEL_HEAP_MAX-KERNEL_HEAP_START)/PAGE_SIZE;
	uint32 va=0;
	uint32 *ptr_table = NULL;
	for(int i = KERNEL_HEAP_START ; i < KERNEL_HEAP_MAX ; i+=PAGE_SIZE)
	{
		int count =0 ;
		ptr_frame_info = get_frame_info(ptr_page_directory,(void*)i, &ptr_table);
		if (ptr_frame_info == NULL)
		{
		    for(int j = i; j < KERNEL_HEAP_MAX;j+=PAGE_SIZE )
		    {
		    	ptr_frame_info = get_frame_info(ptr_page_directory,(void*)j, &ptr_table);
		    	if (ptr_frame_info == NULL)
		    	{
		    		count++;
		    	}
		    	else
		    	{
		    		if (count<min && count>=num_of_pages)
		    		{
		    			min=count;
		    			va=i;
		    			break;
		    		}
		    		else
		    			break;
		    	}
		    }
		}
	}
	uint32 ret=va;
	for(int i = 0;i<num_of_pages;i++)
	{
		ptr_table=NULL;
		ptr_frame_info = get_frame_info(ptr_page_directory, (void*)va, &ptr_table);
		allocate_frame(&ptr_frame_info) ;
		map_frame(ptr_page_directory, ptr_frame_info, (void*)va, PERM_USER|PERM_WRITEABLE);
		va+=PAGE_SIZE;
	}
 
    //NOTE: Allocation is based on BEST FIT strategy
	//NOTE: All kernel heap allocations are multiples of PAGE_SIZE (4KB)
	//refer to the project presentation and documentation for details
 
	//TODO: [PROJECT 2019 - BONUS1] Implement the FIRST FIT strategy for Kernel allocation
	// Beside the BEST FIT
	// use "isKHeapPlacementStrategyFIRSTFIT() ..." functions to check the current strategy
 
	//change this "return" according to your answer
	if(ret == 0)
	return NULL;
	else
	return (void*)ret;
 

Main.java:1: error: class, interface, or enum expected
int num_of_pages = size / PAGE_SIZE ;
^
Main.java:1: error: class, interface, or enum expected
int num_of_pages = size / PAGE_SIZE ;
    ^
Main.java:2: error: class, interface, or enum expected
	num_of_pages= ROUNDUP(num_of_pages,PAGE_SIZE);
	^
Main.java:3: error: class, interface, or enum expected
	uint32 min=9999;
	^
Main.java:4: error: class, interface, or enum expected
	struct Frame_Info* ptr_frame_info;
	^
Main.java:5: error: class, interface, or enum expected
	int num_of_pages_Kheap = (KERNEL_HEAP_MAX-KERNEL_HEAP_START)/PAGE_SIZE;
	^
Main.java:6: error: class, interface, or enum expected
	uint32 va=0;
	^
Main.java:7: error: class, interface, or enum expected
	uint32 *ptr_table = NULL;
	^
Main.java:8: error: class, interface, or enum expected
	for(int i = KERNEL_HEAP_START ; i < KERNEL_HEAP_MAX ; i+=PAGE_SIZE)
	^
Main.java:8: error: class, interface, or enum expected
	for(int i = KERNEL_HEAP_START ; i < KERNEL_HEAP_MAX ; i+=PAGE_SIZE)
	                                ^
Main.java:8: error: class, interface, or enum expected
	for(int i = KERNEL_HEAP_START ; i < KERNEL_HEAP_MAX ; i+=PAGE_SIZE)
	                                                      ^
Main.java:11: error: class, interface, or enum expected
		ptr_frame_info = get_frame_info(ptr_page_directory,(void*)i, &ptr_table);
		^
Main.java:12: error: class, interface, or enum expected
		if (ptr_frame_info == NULL)
		^
Main.java:14: error: class, interface, or enum expected
		    for(int j = i; j < KERNEL_HEAP_MAX;j+=PAGE_SIZE )
		                   ^
Main.java:14: error: class, interface, or enum expected
		    for(int j = i; j < KERNEL_HEAP_MAX;j+=PAGE_SIZE )
		                                       ^
Main.java:17: error: class, interface, or enum expected
		    	if (ptr_frame_info == NULL)
		    	^
Main.java:20: error: class, interface, or enum expected
		    	}
		    	^
Main.java:26: error: class, interface, or enum expected
		    			va=i;
		    			^
Main.java:27: error: class, interface, or enum expected
		    			break;
		    			^
Main.java:28: error: class, interface, or enum expected
		    		}
		    		^
Main.java:31: error: class, interface, or enum expected
		    	}
		    	^
Main.java:36: error: class, interface, or enum expected
	for(int i = 0;i<num_of_pages;i++)
	^
Main.java:36: error: class, interface, or enum expected
	for(int i = 0;i<num_of_pages;i++)
	              ^
Main.java:36: error: class, interface, or enum expected
	for(int i = 0;i<num_of_pages;i++)
	                             ^
Main.java:39: error: class, interface, or enum expected
		ptr_frame_info = get_frame_info(ptr_page_directory, (void*)va, &ptr_table);
		^
Main.java:40: error: class, interface, or enum expected
		allocate_frame(&ptr_frame_info) ;
		^
Main.java:41: error: class, interface, or enum expected
		map_frame(ptr_page_directory, ptr_frame_info, (void*)va, PERM_USER|PERM_WRITEABLE);
		^
Main.java:42: error: class, interface, or enum expected
		va+=PAGE_SIZE;
		^
Main.java:43: error: class, interface, or enum expected
	}
	^
Main.java:56: error: class, interface, or enum expected
	else
	^
30 errors

Standard output is empty