extern int symbol2Int(char *symbol) {
char *character;
int charAsNum;
character = symbol;
for(int n=0;n<255;n++) {
if(symbolSet[n] == character) { //<<this line is bad
charAsNum = n;
}
}
return(n);
}
it looks right...
Author
Ok, I have this if loop in my program:
Now, when I compile, these are the only two errors I ever get:
C:\programming\bored\main.cpp(17) : error C2446: ''=='' : no conversion from ''char *'' to ''int''
This conversion requires a reinterpret_cast, a C-style cast or function-style cast
C:\programming\bored\main.cpp(17) : error C2040: ''=='' : ''int'' differs in levels of indirection from ''char *''
Error executing cl.exe.
And has the little pointer that shows which line is erroneous on the line that is commented in the code.
I know this is similar to the recent thread about changing ints to chars, but I couldn''t find what I was looking for on that thread, so here I am, lol. What''s wrong with that code? Thanks.
-AJ
C:\DOS
C:\DOS\RUN
RUN\DOS\RUN
-Comic Book Store Guy''s t-shirt that I saw on the Simpsons, although it didn''t actually come from the Simpsons.
http://vdsoft.netfirms.com/home.html
I''m not sure what this function is supposed to do. If symbol points to one char (as opposed to a zero terminated string), then:
int i = (int)(*symbol);
does the job.
If symbol points to a string containing the "ASCII" representation of an integer, than
int i;
sscanf("%d", symbol, &i);
does the job.
Forever trusting who we are
And nothing else matters - Metallica
int i = (int)(*symbol);
does the job.
If symbol points to a string containing the "ASCII" representation of an integer, than
int i;
sscanf("%d", symbol, &i);
does the job.
Forever trusting who we are
And nothing else matters - Metallica
Author
Well the problem is that, looking at it, there are no conflicts of data types.
Here''s the function again so you don''t have to scroll back up:
now, character and symbol are boths chars, nor problem. symbolSet[n] and character are both chars, again no problem. Same goes for charAsNum and n . There isn''t any apparent conflict of data type, so what''s wrong? Thanks.
-AJ
C:\DOS
C:\DOS\RUN
RUN\DOS\RUN
-Comic Book Store Guy''s t-shirt that I saw on the Simpsons, although it didn''t actually come from the Simpsons.
http://vdsoft.netfirms.com/home.html
Here''s the function again so you don''t have to scroll back up:
char symbolSet[255]; //<<was not in originally post functionextern int symbol2Int(char *symbol) { char *character; int charAsNum; character = symbol; for(int n=0;n<255;n++) { if(symbolSet[n] == character) {//<<erroneous line charAsNum = n; } } return(n);} now, character and symbol are boths chars, nor problem. symbolSet[n] and character are both chars, again no problem. Same goes for charAsNum and n . There isn''t any apparent conflict of data type, so what''s wrong? Thanks.
-AJ
C:\DOS
C:\DOS\RUN
RUN\DOS\RUN
-Comic Book Store Guy''s t-shirt that I saw on the Simpsons, although it didn''t actually come from the Simpsons.
http://vdsoft.netfirms.com/home.html
quote:now, character and symbol are boths chars
Nope. character is a pointer to char . symbolSet[n] is, indeed a char.
Forever trusting who we are
And nothing else matters - Metallica
There is actually a type conflict, since symbolSet[n] is a char but character is a char*. But what do you actually want to do?
been to slow
[edited by - VolkerG on May 3, 2002 5:19:56 PM]
been to slow
[edited by - VolkerG on May 3, 2002 5:19:56 PM]
You might want to just pass a char (by value) to the function. If for some reason you need to pass the pointer to a character, I think you could do the comparison as
[edited by - Miserable on May 3, 2002 5:24:55 PM]
(symbolSet[n] == *character) [edited by - Miserable on May 3, 2002 5:24:55 PM]
Author
Thanks for the replies guys, but I went ahead and tried something and it worked. I changed the char to an int first with atoi() and then did my comparison and it worked fine. Thanks.
-AJ
C:\DOS
C:\DOS\RUN
RUN\DOS\RUN
-Comic Book Store Guy''s t-shirt that I saw on the Simpsons, although it didn''t actually come from the Simpsons.
http://vdsoft.netfirms.com/home.html
-AJ
C:\DOS
C:\DOS\RUN
RUN\DOS\RUN
-Comic Book Store Guy''s t-shirt that I saw on the Simpsons, although it didn''t actually come from the Simpsons.
http://vdsoft.netfirms.com/home.html
It''s not clear why you are doing this, but the algorithm you are implementing can be improved by making symbolSet an int rray, and using the value held in *character as in index into the array. Thus you can have:
I''m a bit bamboozled by your use of char*, as I suspect you might be trying to use a c-string instead of a single char. If that''s the case, you need to restate your problem.
[ C++ FAQ Lite | ACCU | Boost | Python | Agile Manifesto! ]
char character = some_value;int charAsNum = symbolSet[character]; I''m a bit bamboozled by your use of char*, as I suspect you might be trying to use a c-string instead of a single char. If that''s the case, you need to restate your problem.
[ C++ FAQ Lite | ACCU | Boost | Python | Agile Manifesto! ]
Author
Ok, same program, new problem. What''s wrong with this line:
char *fileRead;
while(fscanf(someFile[0], "%c", &fileRead) != EOF)
Thanks.
-AJ
C:\DOS
C:\DOS\RUN
RUN\DOS\RUN
-Comic Book Store Guy''s t-shirt that I saw on the Simpsons, although it didn''t actually come from the Simpsons.
http://vdsoft.netfirms.com/home.html
char *fileRead;
while(fscanf(someFile[0], "%c", &fileRead) != EOF)
Thanks.
-AJ
C:\DOS
C:\DOS\RUN
RUN\DOS\RUN
-Comic Book Store Guy''s t-shirt that I saw on the Simpsons, although it didn''t actually come from the Simpsons.
http://vdsoft.netfirms.com/home.html
This topic is closed to new replies.
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