23 May UNIX Systems Programming And Perl
Add to your Perl script the ability to kill a user’s processes. The requirements for this task include the following:
- Add this option to the menu.
- Add the code/process into a subroutine.
- Use an array to store the list of processes that need to be reviewed and killed.
- Process the kill using the array.
Next, you have been asked by different users to explain how to compile a program in a UNIX environment.
Finally, take the following C program (save it as “power2.c”), and create it as a file in your UNIX environment:
/* power2.c — Print out powers of 2: 1, 2, 4, 8, .. up to 2^N */
#include <stdio.h> <stdio.h>
#define N 16int main(void) {
int n; /* The current exponent */
int val = 1; /* The current power of 2 */
printf(“/t n /t 2^n/n”);
printf(“/t================/n”);
for (n=0; n<=N; n++) {
printf(“/t%3d /t %6d/n”, n, val);
val = 2*val;
}
return 0;
}
/* It prints out :
n 2^n
===============
0 1
1 2
2 4
3 8
4 16
5 32
6 64
7 128
8 256
9 512
10 1024
11 2048
12 4096
13 8196
14 16384
15 32768
16 65536
*/
Describe the behavior when you compile the program, with no options. What is the command that you would use to compile the code and create the executable “power2”?
Finally, compare and contrast the usage of a compiled and interpreted program.
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