How do i use the random number function?

[Chris Winton]

Hello I'm using the random number function to try to multiply the values in the array O by a random number but receive the error - invalid operands to binary error*. Thanks for any help.

#include <stdio.h>
#include <stdlib.h>

double O[1][6] = {{1, 1, 1, 1, 1, 1}};

/*********** random number generator *******************/
double srandom()   
{
return 2*((rand()/(double)RAND_MAX) - 0.5);
}
/**************** main ********************************/
int main()
{
double z [1][6];
zrandom = O  * frand();
}

Cheers
Chris

[horace1]

in line

zrandom = O  * frand();

you don't have am identifier zrandom (should it be z?) and O is an array so needs indexes, e.g. O[1][2]

[Chris Winton]

Ah that would explain alot, also it was indexes for z and o that were causing the issues. Thanks for your help.