Question

Hi here is my problem i am able to input values for my matrix as such

for(i=0;i<n;i++)
{
for(j=0;j<n;j++){
scanf("%d",&a[i][j]);

how ever this is very tedious for matrices of a large order and i cant get the matrix to work with pointers and the rand function

for(i=0;i<n;i++)
    {
    for(j=0;j<n;j++){
&a[i][j] = -1 + rand() * (double)(2) / RAND_MAX;

this code compiles but results in errors also this with out the & operator compiles and gives me incorrect results as well

a[i][j] = -1 + rand() * (double)(2) / RAND_MAX;

what am i missing for the pointers to work as such?

Answer 1

Apparently a is an array of int (you are using "%d" to input values with scanf).

The expression you use generates doubles (ranging from -1 to 1) that when converted to int result in 0. I guess that’s what you see in a.

Make a an array of doubles.