gtkccalc

#include<gtk/gtk.h>
#include<ctype.h>
#include<string.h>
#define DOT 10
#define ADD 11
#define SUB 12
#define MUL 13
#define DIV 14
#define EQL 15
void handle(GtkWidget *source, gpointer data)
{
    char *x;
    x =gtk_button_get_label(GTK_BUTTON(source));
//  g_printf("%s",x);
//  gtk_widget_hide(source);
    GtkEntry *entry = GTK_ENTRY(data);
    char str[50];
    if(isdigit(x) != 0)
    {
        strcpy(str,gtk_entry_get_text(entry));
        strcat(str,x);
        gtk_entry_set_text(entry,str);
    }
}
int main(int argc,char **argv)
{
    gtk_init(&argc,&argv);
    GtkWidget *window;
    GtkWidget *resultbox;
    GtkWidget *table;
    GtkWidget *button[16];
    window =gtk_window_new(GTK_WINDOW_TOPLEVEL);
    gtk_window_set_default_geometry(GTK_WINDOW(window),350,200);
    gtk_window_set_title(GTK_WINDOW(window), "Simple Calculator Application");

    table = gtk_table_new(4,4,TRUE);

    /*--------------------------------------------------------------*/
    resultbox = gtk_entry_new();
    gtk_table_attach_defaults(GTK_TABLE(table),resultbox,0,4,0,1);

    button[7] = gtk_button_new_with_label("7");
    gtk_table_attach_defaults(GTK_TABLE(table),button[7],0,1,1,2);

    button[8] = gtk_button_new_with_label("8");
    gtk_table_attach_defaults(GTK_TABLE(table),button[8],1,2,1,2);

    button[9] = gtk_button_new_with_label("9");
    gtk_table_attach_defaults(GTK_TABLE(table),button[9],2,3,1,2);

    button[DIV] = gtk_button_new_with_label("/");
    gtk_table_attach_defaults(GTK_TABLE(table),button[DIV],3,4,1,2);
    /*-------------------------------------------------------------*/

    button[4] = gtk_button_new_with_label("4");
    gtk_table_attach_defaults(GTK_TABLE(table),button[4],0,1,2,3);

    button[5] = gtk_button_new_with_label("5");
    gtk_table_attach_defaults(GTK_TABLE(table),button[5],1,2,2,3);

    button[6] = gtk_button_new_with_label("6");
    gtk_table_attach_defaults(GTK_TABLE(table),button[6],2,3,2,3);

    button[MUL] = gtk_button_new_with_label("X");
    gtk_table_attach_defaults(GTK_TABLE(table),button[MUL],3,4,2,3);
    /*-----------------------------------------------------------*/
    button[1] = gtk_button_new_with_label("1");
    gtk_table_attach_defaults(GTK_TABLE(table),button[1],0,1,3,4);

    button[2] = gtk_button_new_with_label("2");
    gtk_table_attach_defaults(GTK_TABLE(table),button[2],1,2,3,4);

    button[3] = gtk_button_new_with_label("3");
    gtk_table_attach_defaults(GTK_TABLE(table),button[3],2,3,3,4);

    button[SUB] = gtk_button_new_with_label("-");
    gtk_table_attach_defaults(GTK_TABLE(table),button[SUB],3,4,3,4);
    /*----------------------------------------------------------*/
    button[0] = gtk_button_new_with_label("0");
    gtk_table_attach_defaults(GTK_TABLE(table),button[0],0,1,4,5);

    button[DOT] = gtk_button_new_with_label(".");
    gtk_table_attach_defaults(GTK_TABLE(table),button[DOT],1,2,4,5);

    button[EQL] = gtk_button_new_with_label("=");
    gtk_table_attach_defaults(GTK_TABLE(table),button[EQL],2,3,4,5);

    button[ADD] = gtk_button_new_with_label("+");
    gtk_table_attach_defaults(GTK_TABLE(table),button[ADD],3,4,4,5);

    gtk_container_add(GTK_CONTAINER(window),table);
    /*-----------------------------------------------------------*/

    g_signal_connect(window,"delete-event",G_CALLBACK(gtk_main_quit),NULL);
    int i;
    for(i =0; i<16;i++)
        g_signal_connect(button[i],"clicked",G_CALLBACK(handle),resultbox);
    gtk_widget_show_all(window);

    gtk_main();
    return 0;
}