如何解决如何在 gfortran 中使用调用系统调用 '<<EOF... EOF' 之间的代码?
gnuplot -persist <<EOF
set title "grafico"
plot "salida.txt"
EOF
"salida.txt"
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解决方法
mainWindow = tk.Tk()
loginWindow = tk.Tk()
version = ("v0.1")
def centerwindowLogin(width=300,height=200):
screen_width = loginWindow.winfo_screenwidth()
screen_height = loginWindow.winfo_screenheight()
x = (screen_width/2) - (width/2)
y = (screen_height/2) - (height/2)
loginWindow.geometry('%dx%d+%d+%d' % (width,height,x,y))
def centerwindowMain(width=300,height=200):
screen_width = mainWindow.winfo_screenwidth()
screen_height = mainWindow.winfo_screenheight()
x = (screen_width/2) - (width/2)
y = (screen_height/2) - (height/2)
mainWindow.geometry('%dx%d+%d+%d' % (width,y))
def login():
loginWindow.title("SCC v0.1")
header = tk.Label(loginWindow,text = "Please Login").pack()
tk.Label(loginWindow,text = "Username").pack()
tk.Entry(loginWindow).pack()
tk.Label(loginWindow,text = "Password").pack()
tk.Entry(loginWindow).pack()
tk.Checkbutton(loginWindow,text = "Keep Me Logged In").pack()
tk.Button(loginWindow,text = "Login",command = mainMenu).pack()
centerwindowLogin(300,175)
loginWindow.mainloop()
def mainMenu():
loginWindow.withdraw()
mainWindow.title("SCC v0.1")
tk.Label(mainWindow,text = "Welcome to the Sentinel Command Center").pack()
tk.Button(mainWindow,text = "Network Utilities",fg = "orange").pack()
tk.Button(mainWindow,text = "Image Recognition",text = "Voice Recognition",fg = "orange").pack()
centerwindowMain(500,400)
mainWindow.mainloop()
login()
,
program gnuplot
implicit none
character(len=1000) :: command
command = "gnuplot -persist <<EOF"//new_line('A')//&
"set title 'grafico'"//new_line('A')//&
"plot 'salida.txt'"//new_line('A')//&
"EOF"
! system() is a GNU extension. This is more portable:
call EXECUTE_COMMAND_LINE(command)
end program
注意字符串连接的 //
和行继续的 &
。
如果您不介意使用 GNU 扩展,请使用 -fbackslash
标志进行编译,如果您愿意,可以像这样编写字符串:
command = "gnuplot -persist <<EOF\n&
&set title 'grafico'\n&
&plot 'salida.txt'\n&
&EOF"
注意 \n
而不是 new_line('A')
。另请注意,这只是一个字符串,而不是连接字符串。像以前一样,有一个 &
表示行继续,但如果字符串是上一行的延续,那么在行首也有一个 &
。
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