#include <stdio.h>

#include <string.h>

#include <math.h>

#include <stdlib.h>

#include <gtk/gtk.h>

#define YES 1

#define NO 0

GtkWidget *entry;

GtkWidget *frame;

GtkWidget *label;

gchar *title="<span foreground=\"red\">Bksp:退格</span> <span foreground=\"green\">CE:清除显示值</span> <span foreground=\"blue\">Clear:清除显示值和任何未完成的运算</span>";

guint Operate_flag=0;

guint Link_flag=YES;

guint Is_bksp=NO;

gdouble Resualt=0;

void clear_click();

void backspace_click();

void ce_click();

void flag_click(GtkButton *button,gpointer data);

void num_click(GtkButton *button,gpointer data);

void suan_click(GtkButton *button,gpointer data);

void deng_click();

void chufa(gdouble num);

GdkPixbuf *create_pixbuf(const gchar *filename);

int main(int argc,char *argv[])

{

GtkWidget *window;

GtkWidget *vbox;

GtkWidget *table;

GtkWidget *button;

guint i,j,num;

gchar *values[20]={"7","8","9",

"4","5","6",

"1","2","3",

"0",".","=",

"/","*","-","+",

"Bksp","CE","Clear","+/-"

};

gtk_init(&argc,&argv);

//窗体设置

window=gtk_window_new(GTK_WINDOW_TOPLEVEL);

gtk_window_set_title(GTK_WINDOW(window),"计算器");

gtk_window_set_default_size(GTK_WINDOW(window),400,300);

gtk_window_set_position(GTK_WINDOW(window),GTK_WIN_POS_CENTER);

gtk_window_set_icon(GTK_WINDOW(window),create_pixbuf("calc.png"));

gtk_container_set_border_width(GTK_CONTAINER(window),10);

g_signal_connect(G_OBJECT(window),"destroy",G_CALLBACK(gtk_main_quit),NULL);

vbox=gtk_vbox_new(FALSE,5);

gtk_container_add(GTK_CONTAINER(window),vbox);

table=gtk_table_new(6,4,TRUE);

gtk_table_set_row_spacings(GTK_TABLE(table),10);

gtk_table_set_col_spacings(GTK_TABLE(table),10);

gtk_box_pack_start(GTK_BOX(vbox),table,TRUE,TRUE,0);

entry=gtk_entry_new();

gtk_entry_set_alignment(GTK_ENTRY(entry),1);

gtk_table_attach_defaults(GTK_TABLE(table),entry,0,4,0,1);

//数字0－9和小数点按钮

num=0;

for(j=2;j<6;j++)

{

for(i=0;i<3;i++)

{

button=gtk_button_new_with_label(values[num]);

gtk_table_attach_defaults(GTK_TABLE(table),button,i,i+1,j,j+1);

num++;

g_signal_connect(G_OBJECT(button),"clicked",G_CALLBACK(num_click),NULL);

if(j==5 && i==1)

i=3;

}

}

//加、减、乘、除按钮

num=12;

for(j=2,i=3;j<6;j++,i--)

{

button=gtk_button_new_with_label(values[num]);

gtk_table_attach_defaults(GTK_TABLE(table),button,3,4,j,j+1);

num++;

g_signal_connect(G_OBJECT(button),"clicked",G_CALLBACK(suan_click),NULL);

}

//等号按钮

button=gtk_button_new_with_label(values[11]);

gtk_table_attach_defaults(GTK_TABLE(table),button,2,3,5,6);

g_signal_connect(G_OBJECT(button),"clicked",G_CALLBACK(deng_click),NULL);

//Backspace按钮

button=gtk_button_new_with_label(values[16]);

gtk_table_attach_defaults(GTK_TABLE(table),button,0,1,1,2);

g_signal_connect(G_OBJECT(button),"clicked",G_CALLBACK(backspace_click),NULL);

//CE按钮

button=gtk_button_new_with_label(values[17]);

gtk_table_attach_defaults(GTK_TABLE(table),button,1,2,1,2);

g_signal_connect(G_OBJECT(button),"clicked",G_CALLBACK(ce_click),NULL);

//Clear按钮

button=gtk_button_new_with_label(values[18]);

gtk_table_attach_defaults(GTK_TABLE(table),button,2,3,1,2);

g_signal_connect(G_OBJECT(button),"clicked",G_CALLBACK(clear_click),NULL);

//+/-按钮

button=gtk_button_new_with_label(values[19]);

gtk_table_attach_defaults(GTK_TABLE(table),button,3,4,1,2);

g_signal_connect(G_OBJECT(button),"clicked",G_CALLBACK(flag_click),NULL);

frame=gtk_frame_new("");

gtk_box_pack_start(GTK_BOX(vbox),frame,TRUE,TRUE,0);

label=gtk_label_new("");

gtk_label_set_markup(GTK_LABEL(label),title);

gtk_container_add(GTK_CONTAINER(frame),label);

gtk_widget_show_all(window);

gtk_main();

}

void num_click(GtkButton *button,gpointer data)

{

Is_bksp=YES;

gtk_label_set_markup(GTK_LABEL(label),title);

gchar num[100]="";

gchar num2[100]="";

const gchar *text1;

const gchar *text2;

text1=gtk_entry_get_text(GTK_ENTRY(entry));

text2=gtk_button_get_label(GTK_BUTTON(button));

if(Link_flag==NO)

{

Link_flag=YES;

}

else

{

g_strlcat(num,text1,100);

}

g_strlcat(num,text2,100);

gtk_entry_set_text(GTK_ENTRY(entry),num);

}

void suan_click(GtkButton *button,gpointer data)

{

deng_click();

const gchar *flag;

flag=gtk_button_get_label(GTK_BUTTON(button));

if(strcmp(flag,"+")==0)

Operate_flag=1;

else if(strcmp(flag,"-")==0)

Operate_flag=2;

else if(strcmp(flag,"*")==0)

Operate_flag=3;

else if(strcmp(flag,"/")==0)

Operate_flag=4;

}

void deng_click()

{

gtk_label_set_markup(GTK_LABEL(label),title);

Is_bksp=NO;

const gchar *text1;

gdouble num,number;

gchar *num1,num2[100]="",num3[100];

gint pointer,fuhao;

if(Link_flag==NO)

Operate_flag=0;

Link_flag=NO;

text1=gtk_entry_get_text(GTK_ENTRY(entry));

num=strtod(text1,NULL);

switch(Operate_flag)

{

case 1:

Resualt=Resualt+num;break;

case 2:

Resualt=Resualt-num;break;

case 3:

Resualt=Resualt*num;break;

case 4:

chufa(num);break;

case 0:

Resualt=num;break;

}

Operate_flag=0;

num1=g_ascii_dtostr(num3,100,Resualt);

g_strlcat(num2,num1,100);

gtk_entry_set_text(GTK_ENTRY(entry),num2);

}

void clear_click()

{

Operate_flag=0;

Link_flag=YES;

Is_bksp=NO;

Resualt=0;

gtk_label_set_markup(GTK_LABEL(label),title);

gtk_entry_set_text(GTK_ENTRY(entry),"");

}

void backspace_click(GtkButton *button,gpointer data)

{

gtk_label_set_markup(GTK_LABEL(label),title);

const char *text1;

char num[100]="";

gint i=0;

text1=gtk_entry_get_text(GTK_ENTRY(entry));

strcpy(num,text1);

if(Is_bksp==YES)

{

while(num[i])

i++;

i--;

num[i]='\0';

}

gtk_entry_set_text(GTK_ENTRY(entry),num);

}

void ce_click(GtkButton *button,gpointer data)

{

gtk_label_set_markup(GTK_LABEL(label),title);

if(Is_bksp==YES)

gtk_entry_set_text(GTK_ENTRY(entry),"");

}

void flag_click(GtkButton *button,gpointer data)

{

gtk_label_set_markup(GTK_LABEL(label),title);

const char *text1;

char num[100]="";

char num2[100]="";

gint i=0;

text1=gtk_entry_get_text(GTK_ENTRY(entry));

strcpy(num,text1);

if(Is_bksp==YES)

{

if(num[0]=='-')

while(num[i])

{

num[i]=num[i+1];

i++;

}

else

{

num2[0]='-';

g_strlcat(num2,num,100);

strcpy(num,num2);

}

}

gtk_entry_set_text(GTK_ENTRY(entry),num);

}

void chufa(gdouble num)

{

gchar *information;

information="<span foreground=\"red\">错误！</span>除数不能为<span foreground=\"red\"><big>零</big></span>！";

if(num==0)

{

gtk_label_set_markup(GTK_LABEL(label),information);

}

else

Resualt=Resualt/num;

}

GdkPixbuf *create_pixbuf(const gchar *filename)

{

GdkPixbuf *pixbuf;

GError *error=NULL;

pixbuf=gdk_pixbuf_new_from_file(filename,&error);

if(!pixbuf)

{

fprintf(stderr, "%s\n", error->message);

g_error_free(error);

}

return pixbuf;

}