On 27/08/12 11:40, Anna Sidera wrote: > Hello, > > I want to use the following command: > > int myvariable = 1000; > float *myarray = malloc(pow(myvariable,3)*sizeof(float)); > > but I don't know if it will work because if sizeof(float) is equal to 4 then pow(myvariable,3)*sizeof(float) is equal to 4 billion which is larger than the maximum integer which is about 2 billion. > > Can you tell me what is the right way to create an array of pow(myvariable,3) floats? > > Many Thanks, > Anna How much memory do you have available? The parameter to malloc is a size_t, you should have no problems providing a size of 4000000000 in a 64 bit system. If you're using a 32 bit system, then you will have problems stating that size. But the address space is also smaller than that, so you couldn't reserve so much memory*, even if you were able to provide that number to malloc(). * using conventional methods. But seems silly not to be using a flat address space nowadays...
