Read from Console

This is a discussion on Read from Console within the C++ Programming forums, part of the General Programming Boards category; Hello all I'm developing a c++ code which reads a line from the console like this: a=18 b=TRUE c=Hello -I ...

  1. #1
    Registered User
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    Oct 2010
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    3

    Read from Console

    Hello all

    I'm developing a c++ code which reads a line from the console like this:

    a=18
    b=TRUE
    c=Hello

    -I want to check the first character.
    -If it's "a" then i'll put the integer value after the equal on a variable that is an argument of the function. I want to use this variable outside the function (not a global variable)
    -If it's a "b" then it's boolean
    -If it's a "c" then its a string.

    Console example:
    a=34

    Call my function (maybe something like this):
    int &i;
    bool b;
    char s[50];
    ReadConsoleLine(&a, &b, c);

    The first character is an "a", therefore i'm going to change the variable "a" to 34.

    I have this, code....
    Will this work?
    Any thoughts?


    Code:
    void ReadConsoleLine(int a, bool b, char *c)
    {
    	char str [50];
    	char tp[5];
    	char * strtoken;
    
    
    	scanf ("%s",str);
    	strtoken = strtok (str,"=");
    	while (strtoken != NULL)
    	{
    		strtoken = strtok (NULL, "="); //gets the text after the equal
    	}
    
            strncpy (tp,str,1); //gets the first character
    
    
    
            if(strcmp(tp, "a") == 0)//integer
    		a = atoi(strtoken);
            else
            {
            	if(strcmp(tp, "b") == 0)//BOOL
       			b = (strcmp(strtoken, "False");
            		
    	       	else
            	{
            		if(strcmp(tp, "c") == 0)//String
         				strcpy(c, strtoken);
            	}
            }
    
    }

    Will this code work?
    Thanks in advance

  2. #2
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    May 2010
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    2,713
    Have you tried the code? Does it work?

    Jim

  3. #3
    and the hat of wrongness Salem's Avatar
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    > I'm developing a c++ code which reads a line from the console like this:
    So why is all the code you've written in C then?

    And no, your code will not work.
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
    If at first you don't succeed, try writing your phone number on the exam paper.
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