Compact C

+ <stdio.h>
$ SQUARE(x) = ((x)*(x))
?+ _WIN32
  $ PLATFORM = "Windows"
:# defined(__linux__)
  $ PLATFORM = "Linux"
:
  $ PLATFORM = "Other"
s Point
  x,y: i32
f sum(a: *i32, n: i32) i32
  total := 0
  for i := 0; i < n; i++
    if a[i] < 0
      ^
    elif a[i] == 0
      !
    total += a[i]
  < total
f main()
  nums: i32[] = {1,2,-3,4,0,5}
  result: i32 = sum(nums, 6)
  ?# defined(TEST)
    if result > 5
      puts(PLATFORM)
    else
      < 1
  :
    result = SQUARE(result)
  while result > 7
    result--
  < result != 7

#include <stdio.h>
#define SQUARE(x) ((x)*(x))
#ifdef _WIN32
#define PLATFORM "Windows"
#elif defined(__linux__)
#define PLATFORM "Linux"
#else
#define PLATFORM "Other"
#endif

typedef struct Point Point;
struct Point {
    int x,y;
};

int sum(int *a, int n) {
    int total = 0;
    for (int i = 0; i < n; i++) {
        if (a[i] < 0) {
            continue;
        } else if (a[i] == 0) {
            break;
        }
        total += a[i];
    }
    return total;
}

int main(void) {
    int nums[] = {1,2,-3,4,0,5};
    int result = sum(nums, 6);
#if defined(TEST)
    if (result > 5) {
        puts(PLATFORM);
    } else {
        return 1;
    }
#else
    result = SQUARE(result);
#endif
    while (result > 7) {
        result--;
    }
    return result != 7;
}