Loading big file in c - c

Question

This is my program code that can load inputs 1GB, 2GB, but I would need to load files larger than 2GB. I work at Windows.
#include <stdio.h>
#include <stdlib.h>
int main() {
FILE *stream;
size_t size;
int fileSize = 0;
char *input;
// Open file, find the size of it
stream = fopen("3GB.bin", "rb");
fseek(stream, 0L, SEEK_END);
fileSize = ftell(stream);
fseek(stream, 0L, SEEK_SET);
input = (char *)malloc(fileSize + 1);
// Stream file into memory
size = fread(input, 1, fileSize, stream);
input[size] = 0;
fclose(stream);
printf("size file is: %d\n", fileSize);
free(input);
return 0;
}
The problem is that it does not load files larger than 2GB at all...
Don't know where the problem is?

Answer 1

#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
int main()
{
FILE *stream;
size_t size;
uint32_t fileSize = 0;
char *input;
int result1, result2;
// Open file, find the size of it
stream = fopen("4GB.bin", "rb");
if (result1 = _fseeki64(stream, 0L, SEEK_END) != 0)
{
printf("_fseeki64 result1 error\n");
}
fileSize = _ftelli64(stream);
if (result2 = _fseeki64(stream, 0L, SEEK_SET)!= 0)
{
printf("_fseeki64 result2 error\n");
}
input = (char *) malloc(fileSize + 1);
if (input == NULL) {
printf("Memory not allocated.\n");
exit(0);
}
//Stream file into memory
size = fread(input, 1, fileSize, stream);
input[size] = 0;
fclose(stream);
printf("size file is: %u\n", fileSize);
free(input);
return 0;
}