Помогите с 4 задачей на языке си

 #include  

#include  

#include  

 

#define RAND(min, max) (rand() % ((max) - (min)) + (min)) 

#define BUFFER 100 

#define NPOS (size_t)-1 

 

void fill(int* box, int a, int b) {

    size_t i = 0;

    do box[i] = RAND(a, b + 1); while (++i != BUFFER);

}

 

void show(int* box) { 

    size_t i = 0; 

    do printf("%4i", box[i]); while (++i != BUFFER); 

    puts("\n"); 

} 

 

size_t minpos(int* box) { 

    size_t i = NPOS; 

    for (size_t j = 0; j < BUFFER; ++j) { 

        if (box[j] > 0) { 

            if (i == NPOS) i = j; 

            else if (box[j] < box[i]) i = j; 

        } 

    } 

    return i; 

} 

 

void replace(int* box, int x) { 

    size_t i = 0; 

    do if (box[i] < 0) box[i] = x; while (++i != BUFFER); 

} 

 

int main(void) { 

    int box[BUFFER] = { 0 }; 

    fill(box, -9, 9); 

    show(box); 

    size_t pos = minpos(box); 

    if (pos == NPOS) puts("Not found!"); 

    else { 

        replace(box, box[pos]); 

        show(box); 

    } 

    return 0; 

} 

 #include  

#include  

#include  

 

#define ARRAY_SIZE 50 

 

#define abs(x) ((x < 0) ? -(x) : (x)) 

 

static void fill_array(int *arr, size_t size) 

{ 

    int i; 

 

    for (i = 0; i < size; i++) { 

        arr[i] = rand() % 21 - 10; 

    } 

} 

 

static void print_array(int *arr, size_t size) 

{ 

    int i; 

 

    for (i = 0; i < size; i++) { 

        printf("%d ", arr[i]); 

    } 

 

    putchar('\n'); 

} 

 

static int find_max_abs_min(const int *arr, 

                            size_t size) 

{ 

    int i, max = 0; 

 

    for (i = 0; i < size; i++) { 

        if (arr[i] < 0) { 

            if (max < abs(arr[i])) { 

                max = abs(arr[i]); 

            } 

        }  

    } 

 

    return max; 

} 

 

int main(void) 

{ 

    int i, abs_max; 

    int array[ARRAY_SIZE]; 

 

    srand(time(NULL)); 

 

    fill_array(array, ARRAY_SIZE); 

    print_array(array, ARRAY_SIZE); 

 

    abs_max = find_max_abs_min(array, ARRAY_SIZE); 

 

    for (i = 0; i < ARRAY_SIZE; i++) { 

        if (array[i] >= 0) { 

            array[i] = abs_max; 

        } 

    } 

 

    print_array(array, ARRAY_SIZE); 

    return 0; 

}