i have to write a programm, which can be started with options for a Lecture, but it seems that the option '-r' doesn't work.
我必须编写一个程序，可以使用Lecture的选项启动，但似乎选项'-r'不起作用。
I can compile it without any errors or warnings but if I'm going to start it, it tells me that '-r' is a Non-Option which will be caused from the for-loop after the switch-case block.
我可以编译它没有任何错误或警告，但如果我要启动它，它告诉我'-r'是一个非选项，它将由switch-case块之后的for循环引起。
CLI - 编译 - 运行
#include <pthread.h> /* used for threading */
#include <stdio.h>
#include <unistd.h>
#include <ctype.h> /* used for isprint() function */
#include <stdlib.h> /* used for lrand48, labs, strtol etc. */
#include <time.h> /* used for clock and etc */
#include <assert.h> /* used for assert function */
int rflag = 0; /* Flag for min size (rand) */
int Rflag = 0; /* Flag for max size (rand) */
int rvalue = 0; /* Defualt min size */
int Rvalue = 100; /* Default max size */
int vflag = 0; /* Flag for verbose output */
extern const char *gitversion;
void *PrintHello(void *threadarg) {
/******************************************************
* - print in one line the Thread Number given in threadarg
* and "Hello World"
* - sleep a random time (see line below!)
******************************************************/
pthread_t tid = pthread_self(); /* The Thread Id of the current thread */
int num = *((int*) threadarg); /* Number of the Thread */
long sleeping_time = (lrand48() % (Rvalue - rvalue + 1) + rvalue);
if (sleeping_time < 0) {
sleeping_time = labs(sleeping_time);
}
printf("Hello everybody, I'm thread number %d\n", num);
if (vflag == 1) {
printf("The Thread ID of Thread number %d is = %lu.\n", num, tid);
}
sleep(sleeping_time);
/* say goodbye */
printf("%d: Thread is done after sleeping %ld[s]\n", num, sleeping_time);
return(NULL); /* Dummy to make -Wall happy ... */
}
/*
* Prints a little help to stdout
*/
void printHelp() {
printf("------------------------------HELP--------------------------------\n");
printf("Usage: [Option] [Argument(If required!)]\n\n");
printf("Option '-h' - Prints this Help and the current GIT Revision\n");
printf("Option '-v' - Prints more Informations corresponds to 'verbose'\n");
printf("Option '-t' - Requiers a number as Argument which represents the\n");
printf(" Number of Thread which will be created\n");
printf("Option '-r' - Minimum Randomsize\n");
printf("Option '-R' - Maximum Randomsize\n");
printf("------------------------------------------------------------------\n");
printf("Git Revision #: %s\n", gitversion);
printf("------------------------------------------------------------------\n");
}
int main(int argc, char *argv[]) {
void *status;
long t;
int hflag = 0;
int tflag = 0;
long NumberOfThreads = 4;
int c;
int i;
while((c = getopt(argc, argv, "ht:vr:R:")) != -1) {
switch(c) {
case 'h':
hflag = 1;
break;
case 't':
tflag = 1;
NumberOfThreads = strtol(optarg, NULL, 10);
/*assert(NumberOfThreads != 0);*/
break;
case 'v':
vflag = 1;
break;
case 'r':
rflag = 1;
rvalue = strtol(optarg, NULL, 10);
if (rvalue < 0) {
fprintf(stderr, "The number has to be greater than zero!\n");
exit(-1);
}
break;
case 'R':
Rflag = 1;
Rvalue = strtol(optarg, NULL, 10);
if (Rvalue < 0) {
fprintf(stderr, "The number has to be greater than zero!\n");
exit(-1);
} else if (Rvalue < rvalue) {
fprintf(stderr, "The max number for rand has to be greater than the min number!\n");
exit(-1);
}
break;
case '?':
if (optopt == 't') {
fprintf(stderr, "Option -%c requires an argument!\n", optopt);
} else if (optopt == 'r') {
fprintf(stderr, "Option -%c requires an argument!\n", optopt);
} else if (optopt == 'R') {
fprintf(stderr, "Option -%c requires an argument!\n", optopt);
} else if (isprint(optopt)) {
fprintf(stderr, "Unknow Option -%c!\n", optopt);
} else {
fprintf(stderr, "Unknown Option character '\\x%x'!\n", optopt);
}
return -1;
default:
fprintf(stderr, "Something did go wrong. Please use '-h' for help!\n");
}
for (i = optind; i < argc; i++) {
fprintf(stderr, "Non-option argument %s!\n", argv[i]);
exit(-1);
}
}
if (hflag == 1 && tflag == 0) {
printHelp();
exit(0);
} else if (hflag == 1) {
printHelp();
}
/*******************************************
* Initialise thread attributes here *
*******************************************/
pthread_t threads[NumberOfThreads];
long thread_args[NumberOfThreads];
int check_code;
/*
* Create Threads
*/
for (t = 0; t < NumberOfThreads; t++) {
thread_args[t] = t;
printf("Creating thread %ld\n", t);
check_code = pthread_create(&threads[t], NULL, PrintHello, (void*) &thread_args[t]);
/* Check if everything gone right */
assert(check_code == 0);
/* verbose output */
if (vflag == 1) {
printf("Thread %ld is creted and will do his job now!\n", t);
}
}
for (t = 0; t < NumberOfThreads; t++) {
check_code = pthread_join(threads[t], &status);
assert(check_code == 0);
printf("Main joining with thread %ld\n", t);
if (vflag == 1) {
printf("Completed joining with thread %ld status = %d\n", t, (int) status);
}
}
return (0);
}
1 个解决方案
#1
2
Your for loop where you display your Non-option values is inside your while loop where you call getopt(). Move it so it is after your while loop that contains the call to getopt().
显示非选项值的for循环位于while循环中，您调用getopt（）。移动它，使它在包含对getopt（）的调用的while循环之后。
As it stands your while loop is seeing the first option and then processing the for loop before it is done processing all the options.
因为它代表你的while循环正在查看第一个选项，然后在处理所有选项之前处理for循环。
#1
2
Your for loop where you display your Non-option values is inside your while loop where you call getopt(). Move it so it is after your while loop that contains the call to getopt().
显示非选项值的for循环位于while循环中，您调用getopt（）。移动它，使它在包含对getopt（）的调用的while循环之后。
As it stands your while loop is seeing the first option and then processing the for loop before it is done processing all the options.
因为它代表你的while循环正在查看第一个选项，然后在处理所有选项之前处理for循环。