CHAPTER 18. ARRAYS CHAPTER 18. ARRAYS
for (y=0; y<4; y++)
a[x][y]=0;// fill second row by 0..3:
for (y=0; y<4; y++)
a[1][y]=y;
};
All three rows are marked with red. We see that second row now has values 0, 1, 2 and 3:
Figure 18.7:OllyDbg: array is filledColumn filling example
Let’s fill the third column with values: 0..2:
Listing 18.21: Column filling example#include <stdio.h>
char a[3][4];
int main()
{
int x, y;
// clear array
for (x=0; x<3; x++)
for (y=0; y<4; y++)
a[x][y]=0;// fill third column by 0..2:
for (x=0; x<3; x++)
a[x][2]=x;
};
The three rows are also marked in red here. We see that in each row, at third position these values are written: 0, 1 and 2.
Figure 18.8:OllyDbg: array is filled18.6.2 Access two-dimensional array as one-dimensional
We can be easily assured that it’s possible to access a two-dimensional array as one-dimensional array in at least two ways:
#include <stdio.h>
char a[3][4];
char get_by_coordinates1 (char array[3][4], int a, int b)
{
return array[a][b];