assign zero to item in char array [closed]

Question

I have some materials showing this code. what does code means by making these assignments?

char inputfilename[128];
inputfilename[0] = 0;

char *argv[128];
*argv[1] = 0;

Answer 1

In C, character arrays are terminated by a null character (value 0). In both cases in your example, the code initializes the strings to "empty" (with a terminator in the first element). This would prove useful in any subsequent string operations (strcat, strcpy, etc.).