---

#include <stdio.h>

#define HORIZONTAL "|"
#define VERTICAL "—"
#define SPACE " "

typedef struct {
    int x;
    int y;
} point_t;

typedef struct {
    point_t start;
    point_t end;
} vector_t;

static int xdraw(vector_t vector);
static int ydraw(vector_t vector);

int main() {
    vector_t one = {{2, 3}, {30, 3}};
    vector_t two = {{3, 2}, {3, 7}};
    vector_t three = {{2, 0}, {30, 0}};

    xdraw(one);
    ydraw(two);
    xdraw(three);
    ydraw(two);
    xdraw(three);
    
    return 0;
}

static int xdraw(vector_t vector) {
    if (vector.start.y >= 1) {
        for (int i = 0; i < vector.start.y; i++) {
            printf("\n");
        }
    }
    
    if (vector.start.x >= 1) {
        for (int i = 0; i < vector.start.x; i++) {
            printf("%s", SPACE);
        }
    }

    int len = vector.end.x - vector.start.x;

    for (int i = 0; i < len; i++) {
        printf("%s", VERTICAL);
    }

    printf("\n");
    return 0;
}

static int ydraw(vector_t vector) {
    int len = vector.end.y - vector.start.y;

    for (int i = 0; i < len; i++) {
        if (vector.start.x >= 1) {
            printf("%s", SPACE);
        }

        printf("%s\n", HORIZONTAL);
    }
    
    return 0;
}