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void test()
{
  const size_t Gbyte = 1024 * 1024 * 1024;
  size_t i;
  char *Pointers[3];
  // Allocate
  for (i = 0; i != 3; ++i)
    Pointers[i] = (char *)malloc(Gbyte);
  // Use
  for (i = 0; i != 3; ++i)
    Pointers[i][0] = 1;
  // Free
  for (i = 0; i != 3; ++i)
    free(Pointers[i]);
}

prog.c: In function 'test':
prog.c:3:9: error: unknown type name 'size_t'
   const size_t Gbyte = 1024 * 1024 * 1024;
         ^
prog.c:4:3: error: unknown type name 'size_t'
   size_t i;
   ^
prog.c:8:5: warning: implicit declaration of function 'malloc' [-Wimplicit-function-declaration]
     Pointers[i] = (char *)malloc(Gbyte);
     ^
prog.c:8:27: warning: incompatible implicit declaration of built-in function 'malloc'
     Pointers[i] = (char *)malloc(Gbyte);
                           ^
prog.c:14:5: warning: implicit declaration of function 'free' [-Wimplicit-function-declaration]
     free(Pointers[i]);
     ^
prog.c:14:5: warning: incompatible implicit declaration of built-in function 'free'

Standard output is empty