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Hi, I am using calloc in a function to allocate memory to my array. This function writes to the array different number of elements each time the function is called. Here is my problem. Say for the first time function writes to all the 3 locations and next time it writes to only first 2 locations. After the second call, the 3rd memory locations still contains the value written by the first function call. I understand that is the way it works.But I want to know if there is a way to erase all the locations before calling the function again? Is there any built-in function available? Also when I print the values of array initially it doesn't print zeroes. I have read that calloc initializes the memory fields to 0's. Following is the function code.
function write_to_array(int value) { int xdata *ascii_value,i; ascii_value = calloc(3, sizeof (int)); for(i=0;value!=0;i++) { mod = value%10; c = mod+'0'; ascii_value[i] = toascii(c); value/=10; } }
Ramya,
From your initial post, I can understand that you are writing a function which reads a number in decimal form and stores it in the ASCII form in the XRAM.
I can't understand why are you trying to use calloc and all. Any way your array index does not exceed 5 because the input parameter for the function is 'int'. Then why can you constantly allocate some array with size 5 and clear them by just assigning it to 0?
If you call the calloc to allocate a sum of 5 bytes, I think this is not necessory.Why do you want to let the controller to go through such linked list and all? This will increase your code size and decrease your execution speed. Think over it.