Средства и методы разработки

#include <stdint.h>

// Determine the common type for two values
#define COMMON_TYPE(x, y) _Generic((x), \
    int16_t: _Generic((y), \
        int16_t: int16_t, \
        int32_t: int32_t, \
        int64_t: int64_t, \
        float: float, \
        double: double \
    ), \
    int32_t: _Generic((y), \
        int16_t: int32_t, \
        int32_t: int32_t, \
        int64_t: int64_t, \
        float: float, \
        double: double \
    ), \
    int64_t: _Generic((y), \
        int16_t: int64_t, \
        int32_t: int64_t, \
        int64_t: int64_t, \
        float: float, \
        double: double \
    ), \
    float: _Generic((y), \
        int16_t: float, \
        int32_t: float, \
        int64_t: float, \
        float: float, \
        double: double \
    ), \
    double: _Generic((y), \
        int16_t: double, \
        int32_t: double, \
        int64_t: double, \
        float: double, \
        double: double \
    ) \
)

// MAX macro with type promotion
#define MAX(x, y) ({ \
    COMMON_TYPE(x, y) _x = (x); \
    COMMON_TYPE(x, y) _y = (y); \
    _Generic(_x, \
        int16_t: max_i16, \
        int32_t: max_i32, \
        int64_t: max_i64, \
        float: max_float, \
        double: max_double \
    )(_x, _y); \
})

// MIN macro (similar to MAX)
#define MIN(x, y) ({ \
    COMMON_TYPE(x, y) _x = (x); \
    COMMON_TYPE(x, y) _y = (y); \
    _Generic(_x, \
        int16_t: min_i16, \
        int32_t: min_i32, \
        int64_t: min_i64, \
        float: min_float, \
        double: min_double \
    )(_x, _y); \
})

Блин, это даже в реальном коде использовать можно! Круто!!!