Pointers with multidimensional arrays in c [closed] - c

Question

It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center.
Closed 10 years ago.
i have a function that generates randomize numbers between 0 and 2,and i want to use pointers but anyway i could not executed it.
First i generate randomize number and then i want to print the multidimensional array to see what it has generated
i just want to assign randomized number to an array(with using pointers) and then print them using pointers again
int **RandomizedMatrix; //integer multidimensional array
int ***AdressOfMatrix = &RandomizedMatrix; //assigning the adress of matrix to an integer pointer
void RandomizedMatrixGenerator(int LineNumber,int ColumnNumber,int ***AdressOfMatrix)
{
int i,j;
for (i=0; i<LineNumber*ColumnNumber; i++)
{
**AdressOfMatrix = rand()%2;
}
for (i=0; i<LineNumber; i++)
{
for (j=0; j<ColumnNumber; j++)
{
printf("%d",***(AdressOfMatrix+i)+j);
}
printf("\n");
}
}

Answer 1

If what i understand is right you want to fill your 2 dimensional array with 1s and 0s so you can do that
void randmtrgen(int row,int column,int **mtr){
int i,j;
for (i=0;i<row;i++){
for (j=0;j<column;j++){
mtr[row][column]=rand()%1+1;
}
}
}
That will fill your matrix as you wish and i suggest you to not use dereference operator if you are not good with it square brackets mostly fine.
And if you have an urge to use dereference operator you can use that line
*(*(mtr+row)+column)=rand()%1+1;

Answer 2

OK, so you want to assign random numbers you need two for() loops:
for (i=0; i<LineNumber*ColumnNumber; i++)
{
**AdressOfMatrix = rand()%2;
}
All this is going to do is assign LineNumber*ColumnNumber number of times the first element of your matrix a number. If you want to do it this way, you need to increment the rows and columns while assigning.
Also your "random" number isn't going to be random because you didn't seed it. Here's an example of what you wanted to do:
srand((unsigned) time(NULL)); // Seed the random number generator
for(row = 0; row<LineNumber; row++){
for(col = 0; col<ColumnNumber; col++){
ran = rand()%100; // Generate a randome numer 1-99
*(*(matrix+row)+col) = ran; // assign a random number to the element
}
}
for(row = 0; row<LineNumber; row++) {
for(col = 0; col<ColumnNumber; col++){
printf("[%d]", *(*(matrix+row)+col)); //Display the random number
}
printf("\n");
}
So given a 4x3 matrix, you could get an output like:
[99][33][38]
[59][2][28]
[50][39][2]
[85][45][99]