小编Fab*_*cio的帖子

我正在学习如何一起使用可重入的Bison和Flex.我已经有一个简单的计算器工作,没有可重入的功能.但是,当我激活可重入功能并进行必要的修改时,我无法使其工作.

这是代码:

scanner.l

%{
#include <stdio.h>
#include "parser.tab.h"
%}

%option 8bit reentrant bison-bridge
%option warn noyywrap nodefault
%option header-file="lex.yy.h"

DIGIT [0-9]

%%

"+"    { return ADD; }
"-"    { return SUB; }
"*"    { return MUL; }
"/"    { return DIV; }
{DIGIT}+ { *yylval = atof(yytext); return NUM; }
\n     { return EOL; }
[ \t]  {  }
.      { printf("What is this: %s.\n", yytext); }
%%

parser.y

%{
#include <stdio.h>
#include "lex.yy.h"

void yyerror(yyscan_t scanner, char const *msg); …

是否可以获得标签尺寸？

#include <gtk/gtk.h>

GtkWidget *mainWindow, *titleLabel, *fixedFrame;

mainWindow = gtk_window_new(GTK_WINDOW_TOPLEVEL);

//set window default size, and request size and all stuff

fixedFrame = gtk_fixed_new();
gtk_widget_set_size_request...
gtk_container_add(GTK_CONTAINER(mainWindow), fixedFrame);

titleLabel = gtk_label_new("Welcome!");
gtk_widget_set_size_request(titleLabel, x, y);

gtk_fixed_put(GTK_FIXED(fixedFrame), titleLabel, x1, y2);

我想知道标签的大小"Welcome"(x,y),以计算框架中的正确位置,(x1,y1)但我不知道如何做到这一点.我已经尝试过在GTK文档中搜索但我没有成功.

如果Rdinput返回错误,我正试图优雅地退出我的程序.

#include <mpi.h>
#include <stdio.h>
#include <stdlib.h>

#define MASTER 0
#define Abort(x) MPI_Abort(MPI_COMM_WORLD, x)
#define Bcast(send_data, count, type) MPI_Bcast(send_data, count, type, MASTER, GROUP) //root --> MASTER
#define Finalize() MPI_Finalize()

int main(int argc, char **argv){

  //Code

  if( rank == MASTER ) {
    time (&start);
    printf("Initialized at %s\n", ctime (&start) );      
    //Read file
    error = RdInput();
  }

  Bcast(&error, 1, INT); Wait();

  if( error = 1 ) MPI_Abort(1);

  //Code

  Finalize();
}

节目输出:

mpirun -np 2 code.x 
--------------------------------------------------------------------------
MPI_ABORT was invoked on rank 0 …