小编geo*_*geo的帖子

我使用Ideone.com编译了下面的代码,并弹出以下警告.

rtctimer.c: In function 'rtctimer_next_tick':
rtctimer.c:87.7: warning: ignoring return value of 'read', 
                 declared with attribute warn_unused_result [-Wunused-result]

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <poll.h>
#include <sched.h>
#include <fcntl.h>
#include <math.h>
#include <sys/ioctl.h>
#include <linux/rtc.h>
#include "rtctimer.h"

struct rtctimer_s
{
    int rtc_fd;
    int current_hz;
    int rtc_running;
    int verbose;
    int usecs;
};

rtctimer_t *rtctimer_new( int verbose )
{
    rtctimer_t *rtctimer = malloc( sizeof( rtctimer_t ) );
    if( !rtctimer ) return 0;

    rtctimer->verbose = verbose;
    if( (( rtctimer->rtc_fd …

GtkStyle 已被弃用。我想改用 GtkStyleContext (gtk_style_context_lookup_color) 来查找主题颜色。

我更换成功：

    color = style->bg [GTK_STATE_SELECTED];

和：

    gtk_style_context_lookup_color (context, "theme_selected_bg_color", &color)

但我不知道用什么颜色名称来替换：

    color = style->dark [GTK_STATE_NORMAL];

我需要这些颜色将它们传输到使用 cairo 创建的 vumometer：

gdk_cairo_set_source_rgba (cr, &color);

我有一条线:

Jon Favreau, Stan Lee, Justin Theroux, Robert Downey Jr. (Tony Stark) Gwyneth Paltrow (Pepper Potts) Don Cheadle (James Rhodes)

我想用逗号分割行,并用该结果括起来:

Jon Favreau
Stan Lee
Justin Theroux
Robert Downey Jr. (Tony Stark)
Gwyneth Paltrow (Pepper Potts)
Don Cheadle (James Rhodes)

编辑:特殊情况

线路:Jon Favreau,Stan Lee,Justin Theroux,Robert Downey(Jr.)(Tony Stark)Gwyneth Paltrow(Pepper Potts)Don Cheadle(James Rhodes)

与世界(Jr.)在brakets.输出:

Jon Favreau
Stan Lee
Justin Theroux
Robert Downey (Jr.) (Tony Stark)
Gwyneth Paltrow (Pepper Potts)
Don Cheadle (James Rhodes)

我继续使用以下代码获得'警告:控制到达非空函数的结尾':

static show_message(GtkMessageType type, const char* text, const char* details)
{
    GtkWidget *dialog;

    g_assert(text);

    dialog = gtk_message_dialog_new(NULL, DIALOG_FLAGS, type, GTK_BUTTONS_CLOSE,
        "%s", text);
    if (details) {
        gtk_message_dialog_format_secondary_text(GTK_MESSAGE_DIALOG(dialog), "%s", details);
    }
    gtk_dialog_run(GTK_DIALOG (dialog));
    gtk_widget_destroy(dialog);
}   

当我编译上面的代码时,我得到警告(即控制到达非void函数的结尾):

gui.c: warning: return type defaults to 'int'
gui.c: In function 'show_message':
gui.c: warning: control reaches end of non-void function

我怎么能摆脱这个警告？

谢谢.

当在预设列表中打印工作站列表并且您处于列表的开头或末尾时,您会看到许多空项目.我创建了大约20个站的列表并尝试显示它们,转到列表的开头和结尾.我认为问题在于这段代码:

static void add_button_clicked_cb(GtkWidget *widget, gpointer data)
{
    preset *ps;
    gchar *buffer;
    GtkTreeIter iter = {0};
    GtkAdjustment* v_scb;
    GtkTreePath *path = NULL;
    GList* menuitems;
    GtkWidget *menuitem;

    ps = malloc(sizeof(preset));
    ps->title = g_strdup(_("unnamed"));
    ps->freq = rint(gtk_adjustment_get_value(adj)) / STEPS;
    settings.presets = g_list_append(settings.presets, (gpointer) ps);
    buffer = g_strdup_printf("%.2f", ps->freq);

    gtk_list_store_append(list_store, &iter);
    gtk_list_store_set(list_store, &iter, 0, ps->title, 1, buffer, -1);

    g_free(buffer);
    gtk_tree_selection_unselect_all(selection);

    v_scb = gtk_scrollable_get_vadjustment(GTK_SCROLLABLE(list_view));
    gtk_adjustment_set_value(v_scb, gtk_adjustment_get_upper(v_scb));

    if (main_visible) {
        gtk_combo_box_text_append_text(GTK_COMBO_BOX_TEXT(preset_combo), ps->title);
        mom_ps = g_list_length(settings.presets) - 1;
        preset_combo_set_item(mom_ps);

        menuitems = gtk_container_get_children(GTK_CONTAINER(tray_menu));
        menuitem = gtk_menu_item_new_with_label(ps->title); 

        gtk_menu_shell_insert(GTK_MENU_SHELL(tray_menu), …