# Help to create code in c ++

0

Can you help me to make this code in c ++ please?:

Create a two-dimensional array or array that stores consecutive multiples of 7 (7, 14, 21, 28, ...). The number of rows and columns will be entered by keyboard. The sum of the numbers located in the four corners of the two-dimensional arrangement should be shown.

``````#include <iostream>
using namespace std;

int main(){

cout<<"Ingrese el numero de filas: ";
cin>>filas;
cout<<"ingrese el numero de columnas: ";
cin>>columnas;
for(int i=0; i< filas; i++){
for (int j=0;j<columnas;j++){

}
}

for(int i=0;i<filas;i++) {
for(int j=0;j<columnas;j++) {
cout<<numeros[i][j]<<" ";
}
cout<<"\n";
}
return 0;
}
``````

I managed to create the matrix with multiples of 7 but I can not do the sum in the corners.

Thanks for the help.

asked by Frank Molina 13.07.2017 в 03:01
source

1

but I can not do the sum in the corners.

If the matrix has dimensions `[filas]x[columnas]` then the corners will be located in the coordinates:

• (0,0)
• (0, columns-1)
• (rows-1,0)
• (rows-1, columns-1)

The summation then is trivial:

``````int total = numeros[0][0]
+ numeros[0][columnas-1]
+ numeros[filas-1][0]
+ numeros[filas-1][columnas-1];
``````

0

Although the effersion response is correct when calculating the sum, I see another problem: the creation of the matrix is done before knowing the sizes, and is always 100x100.

So if you want 200 rows, it will give you a segment violation when you are filling the matrix in row 101 and the same with the columns, for that I would create the matrix once you know the rows and columns:

``````#include <iostream>
using namespace std;

int main(){

cout<<"Ingrese el numero de filas: ";
cin>>filas;

cout<<"ingrese el numero de columnas: ";
cin>>columnas;

int numeros[filas][columnas];

for(int i=0; i< filas; i++){
for (int j=0;j<columnas;j++){
}
}

for(int i=0;i<filas;i++) {
for(int j=0;j<columnas;j++) {
cout<<numeros[i][j]<<" ";
}
cout<<"\n";
}
// Respuesta de eferion
int total = numeros[0][0]
+ numeros[0][columnas-1]
+ numeros[filas-1][0]
+ numeros[filas-1][columnas-1];

return 0;
}
``````