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Game-point wrote: How to find the compression type of jpeg, when we give one sample input jpeg file the output result is this image contains (ex.) xxxx compression type.
JPEG images use JPEG Compression. May be you should hardcode the output?
“Follow your bliss.” – Joseph Campbell
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Hello all,
I am trying to figure out how to make an adaptive program, which asks questions and if you get it wrong, it will ask you another question in that area.
I know this will utilize arrays but I am just asking for some guidence on if I should use looping statements or write the whole thing out.
Thoughts on where to start?
"EDIT: The source is on the 9'th reply to this thread. Please read it to help me out."
V/R
Rob
modified on Thursday, January 28, 2010 10:25 AM
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thank you very much, I am reading that now.
Now I have a question. I have the program ask the question
"What is the answer to this queston?"
It then reads the users input, and checks if the answer was correct. If the answer was correct, it will continue. The problem it reads the user input and checks it with the answer, the program exits. I think the problem is its not clearing the user input for the next question.
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It would help if you can post the relevant portion of your code.
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here you go:
chapterone:
system("cls");
cout << "Fill in the blank." << endl;
cout << "Loosely defined, a ____ is a group of computers and other devices (such as printers) that are connected by some type of transmission media." << endl;
cout << "A.)Network " " B.)Router " " C.)Switch " " D.)Internet " << endl;
cin >> userinput ;
if (userinput == B,b,C,c,D,d)
cout << "Sorry, that was a wrong answer." << endl;
else
cout << "Congradulations, your answer is correct!" << endl;
system("cls");
cout << "Fill in the blank." << endl;
cout << "Loosely defined, a ____ is a group of computers and other devices (such as printers) that are connected by some type of transmission media." << endl;
cout << "A.)Network " " B.)Router " " C.)Switch " " D.)Internet " << endl;
cin >> userinput ;
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What is the data type of userinput.
rbwest86 wrote: if (userinput == B,b,C,c,D,d)
This statement is wrong.
It should be -
if (userinput == B || userinput == b || userinput == C || userinput == c || userinput == D || userinput == d)
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thank you for helping me with a lot of my syntax problems. I am still learning C++ obviously.
Now another question I have is how to limit the users input to just A-D. If you put in 0 the program buggs out.
So how can I implement more controls in my program?
A separate note is how to make the program progress correctly. If you get it wrong, I need it to count the questions wrong along with the correct questions and display the results at the end. Do I need to associate userinput with correct and wrong strings?
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K I just got done reading that power point file you sent me.
Now after reading it I think I need to "flush" the stream?
so I should include a cin.clear() ?
Im a little confused. Because I need to store the amount of correct answers, and the amount of incorrect answers. I will mess with it more in the morning.
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#include <iostream>
#include <string>
using namespace std;
int main()
{
int userinput;
int inputcounter = -1;
int correctanswer;
int wronganswer;
int choice;
int A,a,B,b,C,c,D,d;
cout << "Roberts Network+ Test Questions" << endl;
cout << endl;
cout << endl;
cout << "Please Select a Chapter:" << endl;
cout << "Chapter One = 1" << endl;
cout << "Chapter Two = 2" << endl;
cout << "Chapter Three = 3" << endl;
cout << "Chapter Four = 4" << endl;
cout << "Chapter Five = 5" << endl;
cout << "Chapter Six = 6" << endl;
cout << "Chapter Seven = 7" << endl;
cout << "Chapter Eight = 8" << endl;
cout << "Chapter Nine = 9" << endl;
cout << "Chapter Ten = 10" << endl;
cout << "Chapter Eleven = 11" << endl;
cout << "Chapter Twelve = 12" << endl;
cout << "Chapter Thirteen = 13" << endl;
cout << "Chapter Fourteen = 14" << endl;
cout << "Chapter Fifteen = 15" << endl;
cout << endl;
cin >> choice;
switch (choice)
{
case 1: goto chapterone;
break;
case 2: goto chaptertwo;
break;
case 3: goto chapterthree;
break;
case 4: goto chapterfour;
break;
case 5: goto chapterfive;
break;
case 6: goto chaptersix;
break;
case 7: goto chapterseven;
break;
case 8: goto chaptereight;
break;
case 9: goto chapternine;
break;
case 10: goto chapterten;
break;
case 11: goto chaptereleven;
break;
case 12: goto chaptertwelve;
break;
case 13: goto chapterthirteen;
break;
case 14: goto chapterfourteen;
break;
case 15: goto chapterfifteen;
break;
default: cout << "Error, invalid entry." << endl;
}
while (inputcounter <= 20)
{
chapterone:
system("cls");
cout << "Fill in the blank." << endl;
cout << "Loosely defined, a ____ is a group of computers and other devices (such as printers) that are connected by some type of transmission media." << endl;
cout << "A.)Network " " B.)Router " " C.)Switch " " D.)Internet " << endl;
cin >> userinput, inputcounter ;
++inputcounter ;
if (userinput == B || userinput == b || userinput == C || userinput == c || userinput == D || userinput == d)
{
cout << "Sorry, that was a wrong answer." << endl;
++wronganswer ;
}
else
{
cout << "Congradulations, your answer is correct!" << endl;
++correctanswer ;
}
system("cls");
cout << "Fill in the blank." << endl;
cout << "Loosely defined, a ____ is a group of computers and other devices (such as printers) that are connected by some type of transmission media." << endl;
cout << "A.)Network " " B.)Router " " C.)Switch " " D.)Internet " << endl;
cin >> userinput, inputcounter ;
++inputcounter ;
if (userinput == B || userinput == b || userinput == C || userinput == c || userinput == D || userinput == d)
{
cout << "Sorry, that was a wrong answer." << endl;
++wronganswer ;
}
else
{
cout << "Congradulations, your answer is correct!" << endl;
++correctanswer ;
}
system("cls");
}
chaptertwo:
chapterthree:
chapterfour:
chapterfive:
chaptersix:
chapterseven:
chaptereight:
chapternine:
chapterten:
chaptereleven:
chaptertwelve:
chapterthirteen:
chapterfourteen:
chapterfifteen:
cout << "Your score is " << (correctanswer - wronganswer);
return 0;
}
So after reading my source, what are some of the multiple problems I have so far? Please keep in mind that I am trying my hardest to make sense of things and looking online for every possible resource I can.
Thank you in advance.
V/R
Rob
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I am working on a ISAPI filter. I need some information that user entered on a web page. I tried to process SF_NOTIFY_PREPROC_HEADERS, SF_NOTIFY_READ_RAW_DATA and SF_NOTIFY_URL_MAP events, and was only able to get the full header.
How can I get the whole contents of the request, including form, fields and their values?
I'll very much appreciate your help.
Jack
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I'm trying to convert some old code that is using 'calloc' to use 'new' but I'm having a little trouble with this:
void (**temp_stack)(void);
temp_stack=(void (**)())calloc(count+1,sizeof(void *));
I tried using this:
void (**temp_stack)(void);
temp_stack=new (void*[count+1]);
but get the following error:
error C2440: '=' : cannot convert from 'void ** ' to 'void (__cdecl ** )(void)'
Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast
Can anyone help me figure it out?
Thanks,
George
George
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void (**temp_stack)(void);
temp_stack=(void (**)())calloc(count+1,sizeof(void *));
that doesn't even compile in VC6.
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Chris Losinger wrote: that doesn't even compile in VC6.
It does in VC2010. What is the error message you got?
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error C2563: mismatch in formal parameter list
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This should work:
typedef void(* void_pp_fn)(void);
void_pp_fn* temp_stack=new void_pp_fn[count+1];
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I am attempting to perform the following, where I know that T is an integer type of some sort:
template<typename T>
inline T foo(const T a, const unsigned T b) {
...
}However, I am getting a C2146 error that reads, "syntax error : missing ',' before identifier 'b'". For some reason, the compiler doesn't like "unsigned T", so I tried "typename unsigned T" and "unsigned typename T" as well to no avail. Is there some way to make this compile without resorting to something like the following:
template<> struct get_unsigned<long> { public: typedef unsigned long type; };
template<> struct get_unsigned<int > { public: typedef unsigned int type; };
template<> struct get_unsigned<byte> { public: typedef unsigned byte type; };
...
template<typename T>
inline T foo(const T a, const typename get_unsigned<T>::type b) {
...
}Thanks,
Sounds like somebody's got a case of the Mondays
-Jeff
modified on Wednesday, January 27, 2010 4:38 PM
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I think the answer is that you can't use "unsigned" by itself.
What if someone were to try to create an instance of your class of type "unsigned FooBar"?
That wouldn't make any sense, would it?
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That's a never ending discussion that happened inside the standardization commetee.
Your appoint appears correct but is in contrast with SFINAE (Substitution Failure Is Not An Error), that requires errors to be notified only at instantiation.
Otherwise expression like a+b will be subjected to your cnsideration if a and b ar FooBar-s and there is no operator+ for FooBar.
But we all can write
template<class A>
A add(const A& a, const A& b) { return a+b; }
and get errors only upon attempting an instantiation of A with no operator+ available.
The point, here is that the standard does not consider the word unsigned as an adjective to something, but defines "unsigned int", as well as "unsigned long" etc. as type names themselves.
2 bugs found.
> recompile ...
65534 bugs found.
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No, that wouldn't make sense, but it also wouldn't compile. I was under the impression that templates are compiled on a per template-parameter basis... ie, for each distinct set of template parameters, there exists independent assembly at distinct memory addresses. I interpret this as meaning, "As long as a template is syntactically correct, it will be compiled once for each distinct set of template parameters". Therefore, I would expect someone who called my code with class "FooBar" as the template parameter to get an error notifying him/her of an unknown or invalid type, whereas someone compiling with int would work just fine.
As an aside, just because a piece of C++ code can be used in a way that doesn't make sense doesn't mean it is invalid code. The compiler doesn't complain at all if I call numeric_limits<FooBar>::digits, which clearly also doesn't make sense. Sometimes when performing design by contract, verifying that the user abides by the contract is far too expensive to be practical. Most C++ code cannot be written to be idiot-proof.
Sounds like somebody's got a case of the Mondays
-Jeff
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what compiler was used compile a classes in c++
if any subract compiler for classes is there... if there means what about c++ compiler done.....
Best Regard's
Mathy's
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Depends on what platform you are targeting and what platform you are using to develop your programs. Please offer more details on these.
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using only windows platform.....
if am using classes in C programming.... how to compile a classes in C compiler. Its possiable.
Best Regard's
Mathy's
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