Code:
#include <iostream>
#include <fstream>
#include <string>
using namespace std;
#define index 5
struct am{
string rule;
int priority;
}set[index];
void printset(am amg)
{
cout<<amg.rule<<endl;
cout<<amg.priority<<endl;
}
cting76
Last Activity: Apr 5 '07, 05:44 PM
Joined: Mar 11 '07
Location: Lubbock, TX
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Alright I have modified my code into this:
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Shouldn't num=strtok(NULL ,"(")) return NULL if there's no more element after the last ")"?...Leave a comment:
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Thank you! I wasn't aware of the difference between c[i]=infile.get() and infile.get(c,25 6). Now the program can read the line just fine. However, it hangs again if the input is like this:
(arule, 10), (brule,20)(crul e, 30)(drule, 40), (erule, 50)(frule, 60)
I use Visual Studio and it simply says the program (the one I wrote) has stopped working. The output would look like this:
arule
10
...Leave a comment:
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Will someone be so kind to point out why my program hangs? It doesn't give out any error message other than "<program_n ame has stopped working>".
...Code:#include <iostream> #include <fstream> using namespace std; void main() { ifstream infile; char c[256],str[64]; char *rules[50]; int priority[50]; int i=0; char *num;Leave a comment:
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Thank you. That fixes the problem.
I then modified the input into:
Notice that there's no "," between "(erule, 10)", "(frule, 3)", and "(grule, 20)". What I want to do is, let the program read from "(arule, 12)" until "(erule,10) ",...Code:char line[100]="(arule, 12), (brule, 21), (zrule, 70), (drule, 25), (erule, 10)(frule, 3)(grule, 20), (srule, 100)";
Leave a comment:
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strtok question
If I understand it correctly, strtok scans from the first character after the separator. The code below:
...Code:#include <iostream> #include <fstream> using namespace std; void main() { char *rules[50]; int priority[50]; int i=0; char line[100]=" (arule, 12), (brule, 21), (zrule, 70), (drule, 25), (erule, 10)(frule, 3)(grule, 20), (srule, 100)"; -
I kept getting this error when running the program under Visual C++:
Debug Assertion Failed!
Program: ...
File: strtol.c
Line: 94
Expression: nptr != NULL
What did I do wrong? :(
The code:
...Code:#include <iostream> #include <fstream> using namespace std; void main() { ifstream infile; charLeave a comment:
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ok... I understand the concept. Basically I have to write code that would treat everything after '(' and before ',' as string, and everything after ',' and before ')' as int, and if there's a ',' after ')', repeat until there's no ',' after ')'. My question is, what fuction should I use? I mean, how do you tell the program to "read" each character and determine if it's a '(', ',', ')', a letter or a number?
Thanks!...Leave a comment:
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Maybe my flow of thought isn't correct. What I'm trying to do is to write codes that would read lines of data from a txt file, then run a heapsort on them. For example, given the following data:
(arule, 12), (brule, 21), (zrule, 70), (drule, 25), (erule, 10)
(frule, 3)
(grule, 20), (srule, 100)
The program should read and sort the first line of data in an array, then insert the 2nd line, sort the whole...Leave a comment:
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What about reading a line like below from a file, say, "input.txt" :
(arule, 12), (brule, 21), (zrule, 70), (drule, 25), (erule, 10)
I am trying to put the first parameters, i.e. arule,brule,etc into an array, say, [I]rules, and the numbers into another array, say numbers[j].
I assume the first array would have to be string type. When I use strtok it tells me it cannot convert string to char....Leave a comment:
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