Programming Forums > Application Development > C++

AlphaXero · Feb 24th, 2005, 8:34 PM

alright i m a newbie at programming so this and any questions i ask here will more then likely be pretty easy for some of you. anyways, i m attempting to make a text based rpg just to see how things work, ya know just for fun. and i get a error "error: syntax error before string constant." what i am trying to do is be able to enter a word, or set of words and have it call a function, but i dont know what i m doing wrong. Here is my code (also i know you could figure this out, but i am working in C not C++)

(Toggle Plain Text)

start()
{
    char str
    printf ("you see a door what do you do?\n");
    scanf ("%s", str);
    if (str "door" == 0)
     {
       printf ("you get to the door");
     }
}

Mjordan2nd · Feb 24th, 2005, 8:54 PM

Well, the most obvious thing I see is that your str variable needs to be an array. There may be some other errors that I didn't catch at first glance, though, and if there are, let us know.

Edit: Ahh. Just found another one. Your if statement is incorrect. If you want to test for the word door, you need to do it like this:

(Toggle Plain Text)

 if(strcmp(str, "door") == 0)
 {
 	 // code
 }

AlphaXero · Feb 24th, 2005, 8:56 PM

umm, again i m kinda new so how do i make it an array?

Mjordan2nd · Feb 24th, 2005, 8:58 PM

You'll need to declare it as something like this:

(Toggle Plain Text)

 char str[50]; /* 50 can be replaced with any reasonable number -- its the maximium length for a string that can be entered*/

For more information on arrays, check this out:

http://programmingforums.org/forum/s...ead.php?t=1644

AlphaXero · Feb 24th, 2005, 9:02 PM

I changed it to do that, but it still gives me the same error

uman · Feb 24th, 2005, 9:06 PM

did you change the if statement to what Machiavelli said?

Mjordan2nd · Feb 24th, 2005, 9:08 PM

The code compiled for me.

Could you post your entire code? Perhpas there's something wrong with something else.

Also, you need to include string.h for the strcmp() function.

AlphaXero · Feb 24th, 2005, 9:08 PM

how did he chabne the if statement? and here is my full code
-

(Toggle Plain Text)

#include <stdio.h>

start()
{
    char str[80];
    printf ("you see a door what do you do?\n");
    scanf ("%s", str);
    if (str "door" == 0)
     {
       printf ("you get to the door");
     }
}

main()
{
   printf ( "welcome to my crappy txt rpg.\n");
   start()
}

Mjordan2nd · Feb 24th, 2005, 9:15 PM

Look to the post right after your initial one. Don't forget to add string.h as one of your included header files.

AlphaXero · Feb 24th, 2005, 9:18 PM

Thanks it compiled, but i typed in "door" in the program after i ran it and now i run into a different problem. It didnt goto the printf function afterwards it just exited (also i added void before the start() function)

Feb 24th, 2005, 8:34 PM	#1
AlphaXero Newbie Join Date: Feb 2005 Posts: 8 Rep Power: 0	string help alright i m a newbie at programming so this and any questions i ask here will more then likely be pretty easy for some of you. anyways, i m attempting to make a text based rpg just to see how things work, ya know just for fun. and i get a error "error: syntax error before string constant." what i am trying to do is be able to enter a word, or set of words and have it call a function, but i dont know what i m doing wrong. Here is my code (also i know you could figure this out, but i am working in C not C++) (Toggle Plain Text) start() { char str printf ("you see a door what do you do?\n"); scanf ("%s", str); if (str "door" == 0) { printf ("you get to the door"); } } start() { char str printf ("you see a door what do you do?\n"); scanf ("%s", str); if (str "door" == 0) { printf ("you get to the door"); } }

Feb 24th, 2005, 8:54 PM	#2
Mjordan2nd The Supreme Ruler Join Date: May 2004 Location: Houston Posts: 1,476 Rep Power: 6	Well, the most obvious thing I see is that your str variable needs to be an array. There may be some other errors that I didn't catch at first glance, though, and if there are, let us know. Edit: Ahh. Just found another one. Your if statement is incorrect. If you want to test for the word door, you need to do it like this: (Toggle Plain Text) if(strcmp(str, "door") == 0) { // code } if(strcmp(str, "door") == 0) { // code } __________________ "Every gun that is made, every warship launched, every rocket signifies, in the final sense, a theft from those who hunger and are not fed, from those who are cold and are not clothed. The world in arms is not spending money alone. It is spending the sweat of its laborers, the genius of its scientists, the hopes of its children." - Dwight D. Eisenhower Last edited by Mjordan2nd; Feb 24th, 2005 at 8:56 PM.

Feb 24th, 2005, 8:58 PM	#4
Mjordan2nd The Supreme Ruler Join Date: May 2004 Location: Houston Posts: 1,476 Rep Power: 6	You'll need to declare it as something like this: (Toggle Plain Text) char str[50]; /* 50 can be replaced with any reasonable number -- its the maximium length for a string that can be entered/ char str[50]; / 50 can be replaced with any reasonable number -- its the maximium length for a string that can be entered*/ For more information on arrays, check this out: http://programmingforums.org/forum/s...ead.php?t=1644 __________________ "Every gun that is made, every warship launched, every rocket signifies, in the final sense, a theft from those who hunger and are not fed, from those who are cold and are not clothed. The world in arms is not spending money alone. It is spending the sweat of its laborers, the genius of its scientists, the hopes of its children." - Dwight D. Eisenhower

Feb 24th, 2005, 9:08 PM	#7
Mjordan2nd The Supreme Ruler Join Date: May 2004 Location: Houston Posts: 1,476 Rep Power: 6	The code compiled for me. Could you post your entire code? Perhpas there's something wrong with something else. Also, you need to include string.h for the strcmp() function. __________________ "Every gun that is made, every warship launched, every rocket signifies, in the final sense, a theft from those who hunger and are not fed, from those who are cold and are not clothed. The world in arms is not spending money alone. It is spending the sweat of its laborers, the genius of its scientists, the hopes of its children." - Dwight D. Eisenhower

Feb 24th, 2005, 9:08 PM	#8
AlphaXero Newbie Join Date: Feb 2005 Posts: 8 Rep Power: 0	how did he chabne the if statement? and here is my full code - (Toggle Plain Text) #include <stdio.h> start() { char str[80]; printf ("you see a door what do you do?\n"); scanf ("%s", str); if (str "door" == 0) { printf ("you get to the door"); } } main() { printf ( "welcome to my crappy txt rpg.\n"); start() } #include <stdio.h> start() { char str[80]; printf ("you see a door what do you do?\n"); scanf ("%s", str); if (str "door" == 0) { printf ("you get to the door"); } } main() { printf ( "welcome to my crappy txt rpg.\n"); start() } Last edited by AlphaXero; Feb 24th, 2005 at 9:12 PM.

Feb 24th, 2005, 8:56 PM	#3
AlphaXero Newbie Join Date: Feb 2005 Posts: 8 Rep Power: 0	umm, again i m kinda new so how do i make it an array?

Feb 24th, 2005, 9:02 PM	#5
AlphaXero Newbie Join Date: Feb 2005 Posts: 8 Rep Power: 0	I changed it to do that, but it still gives me the same error

Feb 24th, 2005, 9:06 PM	#6
uman Expert Programmer Join Date: Dec 2004 Posts: 794 Rep Power: 5	did you change the if statement to what Machiavelli said?

Feb 24th, 2005, 9:15 PM	#9
Mjordan2nd The Supreme Ruler Join Date: May 2004 Location: Houston Posts: 1,476 Rep Power: 6	Look to the post right after your initial one. Don't forget to add string.h as one of your included header files. __________________ "Every gun that is made, every warship launched, every rocket signifies, in the final sense, a theft from those who hunger and are not fed, from those who are cold and are not clothed. The world in arms is not spending money alone. It is spending the sweat of its laborers, the genius of its scientists, the hopes of its children." - Dwight D. Eisenhower

Feb 24th, 2005, 9:18 PM	#10
AlphaXero Newbie Join Date: Feb 2005 Posts: 8 Rep Power: 0	Thanks it compiled, but i typed in "door" in the program after i ran it and now i run into a different problem. It didnt goto the printf function afterwards it just exited (also i added void before the start() function)

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Programming Forums > Application Development > C++

string help