what wrong with this:

[Thorsan]

im doing the following:

int _tmain(int argc, _TCHAR* argv[])

{

typedef double matrix4x4[4][4];

matrix4x4 *mat = (matrix4x4*)malloc(sizeof(matrix4x4));

for(int i=0;i<4;i++)

{

for(int j=0;j<4;j++)

{

if(i==j) *mat[i][j] = 1;

else *mat[i][j] = 0;
}
//printf("\n");

}
for(int i=0;i<4;i++)

{

for(int j=0;j<4;j++)

{

printf("%f ", *mat[i][j]);

}

printf("\n");

}

return 0;

}

and it does not work. it works on another computer but not mine.
but if i put in the printf("\n") that i have comented out, it works just fine.
why? I get acess vioalation. The debugger shows something like this:
*mat ..... double[4][4]
*mat[i] .... double[4]
*mat[i][j] double
....
mat double[4][4]*
mat[i] double[4][4] //this does not seem correct
mat[i][j] double[4] //this does not seem correct

can anyone help me?

thor andreas

[John Harrison]

Bad precedence, see corrections below.

"Thorsan" <th*****@stud.ntnu.no> wrote in message
news:65**************************@posting.google.c om...

im doing the following:

int _tmain(int argc, _TCHAR* argv[])

{

typedef double matrix4x4[4][4];

matrix4x4 *mat = (matrix4x4*)malloc(sizeof(matrix4x4));

for(int i=0;i<4;i++)

{

for(int j=0;j<4;j++)

{

if(i==j) *mat[i][j] = 1;

else *mat[i][j] = 0;
if (i == j) (*mat)[i][j] = 1;
else (*mat)[i][j] == 0;
}
//printf("\n");

}
for(int i=0;i<4;i++)

{

for(int j=0;j<4;j++)

{

printf("%f ", *mat[i][j]);
printf("%f ", (*mat)[i][j]);

}

printf("\n");

}

return 0;

}

john