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;
}