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even.c
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even.c
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#include <stdio.h>
#include <signal.h>
#include <unistd.h>
void handler(int signal) {
if (signal == SIGINT) {
printf("Yeah!\n");
} else if (signal == SIGHUP) {
printf("Ouch!\n");
}
}
int main(int argc, char* argv[])
{
signal(SIGINT, &handler);
signal(SIGHUP, &handler);
/* declare i (integer) and n (number) */
int i, n;
/* upper limit input */
sscanf(argv[1], "%d", &n); /* argv[1] is the number i pass on to program */
/* for loop to check if i is under n, then add 2 to i if true */
for(i=0; i<n; i++) // for loop, where i increments by 1 if it is lesser than n
{
printf("%d\n", i*2); // prints out i then doubles it by 2
sleep(5);
}
/* can't put for loop before the scan because it would run loop then ask for the number
only because i did it the uninitialized way
and i'm being forced to not hardcode it
this will not anger the compiler ...
i think scanf will initialize them as the code runs
i am in pain */
return 0;
}