Create a rectangle with ASCII code.

This first block of code was originally taken right here from the forum.

Code:

---

#include <stdio.h>
   
int main(void)
{
    int rows, columns, x, y;
 
    while(1)
    {
        printf("Enter number of rows: ");
        scanf("%d", &rows);
        if ((rows < 3) || (rows > 20))
            continue;
        printf("Enter number of columns: ");
            scanf("%d", &columns);
        if ((columns < 3) || (columns > 20))
            continue;
        break;
    }
    for (x = 0; x < rows; x++)
    {
        for (y = 0; y < columns; y++)
        {
            if (x == 0 || x == rows - 1)           
            {
                if (y == 0) 
                printf("+");
                if (y == columns - 1)
                printf("+\n");
                else
                printf("-");
            }
       
            else
            {
                if (y == 0) 
                printf("|");
                if (y == columns - 1)
                printf("|\n");
                else
                printf(" ");
            } 
        }
    }   
return 0;
}


---

For my need I said thus:

Code:

---

#include <stdio.h>
#include <stdlib.h>
   
int main(void)
{
    int largura, altura, x, y;
    //system("cls");
    while(1)
    {
        printf("Digite a medida da largura: ");
            scanf("%d", &largura);
        if ((largura < 3) || (largura > 100))
            continue;
        printf("Digite a medida da altura: ");
        scanf("%d", &altura);
        if ((altura < 3) || (altura > 100))
            continue;
        break;
    }


    for (x = 0; x < altura; x++)
    {
        for (y = 0; y < largura; y++)
        {
            if (x == 0 || x == altura - 1)           
            {
                if (y == 0) 
                //printf("+");
                printf("%c", 218);


                /*if (x != 0) 
                //printf("+");
                printf("a");*/


                if (y == largura - 1)
                //printf("+\n");
                printf("%c\n", 191);
                else
                //printf("-");
                printf("%c", 196);
          }
       
            else
            {
                if (y == 0) 
                //printf("|");
                printf("%c", 179);
                if (y == largura - 1)
                //printf("|\n");
                printf("%c\n", 179);
                else
                printf(" ");
            } 
        }
    }   
getchar();
return 0;
}

---

And I'm not getting the right characters on these two nodes as marked inside the white frames at the top of the print

Attachment 15667

Finally, I need to leave the rectangle completely closed as it should be, can any of your colleagues please help?
Thank you and God Bless ...

Consult your character table to find out which ones to use.

> //printf("+");
> printf("%c", 218);

> //printf("+\n");
> printf("%c\n", 191);

You need to find two more corner characters.
Your edits only suffice for the top-left and top-right corners.

Good afternoon guys, how are you?
Sorry for the delay, but, come on:
I have refined this code in this way, and I just can not make the vertical "right" line to fill the rectangle, nor put it in its right position, on the right side of course, so I came to ask for this force. colleagues.
Thank you and God Bless ...

Attachment 15675

Code:

---

#include <stdio.h>
#include <stdlib.h>


int main(void){
    int l = 0;
    int c = 0;
    int matrix [10][10] = {
            {  1,  2,  3,  4,  5,  6,  7,  8,  9, 10},
            {11, 12, 13, 14, 15, 16, 17, 18, 19, 20},
            {21, 22, 23, 24, 25, 26, 27, 28, 29, 30},
            {31, 32, 33, 34, 35, 36, 37, 38, 39, 40},
            {41, 42, 43, 44, 45, 46, 47, 48, 49, 50},
            {51, 52, 53, 54, 55, 56, 57, 58, 59, 60},
            {61, 62, 63, 64, 65, 66, 67, 68, 69, 70},
            {71, 72, 73, 74, 75, 76, 77, 78, 79, 80},
            {81, 82, 83, 84, 85, 86, 87, 88, 89, 90},
            {91, 92, 93, 94, 95, 96, 97, 98, 99,100}
    };


    system("cls");
    printf("Digite ' L ' : ");
    scanf("%i", &l);
   
    printf("Digite ' C ' : ");
    scanf("%i", &c);
   
    /*linha superior*/
    if (matrix[0][0]){
        printf("%c", 218);//superior esquerdo
    }
   
    for (matrix[0][0] = 0; matrix[0][0] < 1; matrix[0][0]++){
        for (matrix[0][0] = 0; matrix[0][0] < l; matrix[0][0]++){
            printf("%c", 196);
        }
    }


    if (matrix[0][10]){
        printf("%c", 191);//superior direito
    }
    //--------------------------------------------------*/
   
   
    /*linha esquerda*/
    for (matrix[0][0] = 0; matrix[0][0] < 1; matrix[0][0]++){
        for (matrix[9][0] = 0; matrix[9][0] < c; matrix[9][0]++){
            printf("\n%c", 179);
        }
    }
    //---------------------------------------------------*/
   
   
    /*linha direita*/
    for (matrix[0][9] = 10; matrix[0][9] < 10; matrix[0][9]++){
        for (matrix[9][9] = 100; matrix[9][100] < c; matrix[9][100]++){
            printf("%c\n", 179);
        }
    }
    //---------------------------------------------------*/   
   
   
    /*linha infeiror*/
    if (matrix[10][0]){
        printf("\n%c", 192);//inferior esquerdo
    }
   
    for (matrix[9][0] = 0; matrix[9][0] < 1; matrix[9][0]++){
        for (matrix[9][0] = 0; matrix[9][0] < l; matrix[9][0]++){
            printf("%c", 196);
        }
    }


    if (matrix[10][10]){
        printf("%c", 217);//inferior direito
    }
    //--------------------------------------------------*/
   
   
    printf("\n");
    getchar();
    return 0;


}

---

Erm, delete all that matrix stuff and try again.

Maybe you want to print the matrix INSIDE the box, but that's no reason for using random matrix values as loop control variables.

> for (matrix[9][9] = 100; matrix[9][100] < c; matrix[9][100]++)
MASSIVE array overrun, there is no element 100.

Code:

---

    for (matrix[0][0] = 0; matrix[0][0] < 1; matrix[0][0]++){
        for (matrix[0][0] = 0; matrix[0][0] < l; matrix[0][0]++){

---

Using the same variable for both the outer and inner loop will cause surprises.

> if (matrix[10][10])
More array overrun errors.

Look, my friend, I've refactored the code and it came out completely from what I need, which is an array.
I just need to be able to insert these "nodes" with circles in the image below.
I looked, I searched and I found nothing, can you help me in this? Thank you and God Bless ...

Code:

---

#include <stdio.h>
#include <stdlib.h>


int main(void){
        int l = 0;
        int c = 0;
        int matrix [10][10] = {
                        { 1,  2,  3,  4,  5,  6,  7,  8,  9, 10},
                        {11, 12, 13, 14, 15, 16, 17, 18, 19, 20},
                        {21, 22, 23, 24, 25, 26, 27, 28, 29, 30},
                        {31, 32, 33, 34, 35, 36, 37, 38, 39, 40},
                        {41, 42, 43, 44, 45, 46, 47, 48, 49, 50},
                        {51, 52, 53, 54, 55, 56, 57, 58, 59, 60},
                        {61, 62, 63, 64, 65, 66, 67, 68, 69, 70},
                        {71, 72, 73, 74, 75, 76, 77, 78, 79, 80},
                        {81, 82, 83, 84, 85, 86, 87, 88, 89, 90},
                        {91, 92, 93, 94, 95, 96, 97, 98, 99,100}
    };


        system("cls");
        printf("Digite ' L ' : ");
        scanf("%i", &l);
       
        printf("Digite ' C ' : ");
        scanf("%i", &c);
       
        /* linha superior -------------------------------------------------- */
        printf("%c", 218);//superior esquerdo
       
        for (matrix[8][0] = 0; matrix[8][0] < l; matrix[8][0]++){
                printf("%c", 196);
        }


        printf("%c", 191);//superior direito
        /* ----------------------------------------------------------------- */
               
        if (matrix[7][0] = 71){
                printf("%c", 195);
        }
       
        /*linha esquerda*/
        for (matrix[9][9] = 0; matrix[9][9] < c; matrix[9][9]++){
                printf("\n%c", 179);
        }       
       
        /*linha direita [ ? ]*/
       
        /* linha inferior -------------------------------------------------- */
        printf("\n%c", 192);//inferior esquerdo
       
        for (matrix[9][0] = 0; matrix[9][0] < l; matrix[9][0]++){
                printf("%c", 196);       
        }


        printf("%c", 217);//inferior direito
    /* ----------------------------------------------------------------- */
       
       
        printf("\n");
        getchar();
        return 0;
}

---

Attachment 15678

> if (matrix[7][0] = 71)
Suit yourself 'friend'.