no error message but showing project not compiled

[imon]

hello !
i have a probelm which i'm unable to understand.i'm programming in Dev-C++.when i'm compiling the programm i've written it's showing 'compiled successfully' without any error message,but when i want to run it is giving the message 'project not compiled' and hence not running the program.I can't understand what's wrong. Can anyone please help me?

e.g. this program:

#include <iostream>
#include <stdlib.h>
using namespace std;


int main()
{
char s;
#define PRODUKT(N,M,VARIABLE) \
{ \
VARIABLE = N; \
for (unsigned int i = N + 1; i <= M; ++i) \
VARIABLE *= i; \
}
unsigned int ergebnis;
PRODUKT(3,5,ergebnis);
cout << ergebnis << endl;
PRODUKT(3,9,ergebnis);
cout << ergebnis << endl;
system("PAUSE");
cin >> s;
return 0;
}

one more doubt: is it correct if i read the value ( cin >> s) after system("pause") ?
thank you.

[yb1pls]

there notthing wrong it compiles

[vegaseat]

Why even bother with cin >> s ...
Is it April 1st? Or is this a submission to the Annals of Bad Programming?

[mikeSQL]

hello !
i have a probelm which i'm unable to understand.i'm programming in Dev-C++.when i'm compiling the programm i've written it's showing 'compiled successfully' without any error message,but when i want to run it is giving the message 'project not compiled' and hence not running the program.I can't understand what's wrong. Can anyone please help me?

e.g. this program:

#include <iostream>
#include <stdlib.h>
using namespace std;

int main()
{
char s;
#define PRODUKT(N,M,VARIABLE) \
{ \
VARIABLE = N; \
for (unsigned int i = N + 1; i <= M; ++i) \
VARIABLE *= i; \
}
unsigned int ergebnis;
PRODUKT(3,5,ergebnis);
cout << ergebnis << endl;
PRODUKT(3,9,ergebnis);
cout << ergebnis << endl;
system("PAUSE");
cin >> s;
return 0;
}

one more doubt: is it correct if i read the value ( cin >> s) after system("pause") ?
thank you.

ok, I just checked and you know what? It worked just fine a second a go. Then I looked at it again and tried it again and , omg, it worked again!! :eek: Wow, whatya know, it woered. Sorry, just thought I could be fiunny since to day was monday :mrgreen:

[harshchandra]

hi there....ur program is working fine

[vegaseat]

This actually compiles and runs too. I can't tell you way.
Had to move the macro(?) out or get the same results as the originator.

// teasing Dev C++

#include <iostream>
#include <stdlib.h>

#define PRODUKT(N,M,VARIABLE) \
{ \
VARIABLE = N; \
for (unsigned int i = N + 1; i <= M; ++i) \
VARIABLE *= i; \
}

using namespace std;

int main()
{
  char s;
  unsigned int ergebnis;
   
  PRODUKT(3,5,ergebnis); 
  cout << ergebnis << endl;
  PRODUKT(3,9,ergebnis);
  cout << ergebnis << endl;
  system("PAUSE");
  //cin >> s;
  return 0;
}

I wish you would post the original code for Wayne at the Dev-C++ forum:
http://sourceforge.net/forum/forum.php?forum_id=48211

[1o0oBhP]

it might have been confusion of namespaces? surely <stdio.h> should be <cstdio> for namespace std. and vega is right too, that macro needed to be global. only #ifdef / #ifndef / #endif can be in executable statement blocks (i think anyway, there may be others). For example

if(x == 1)
    #define message "x equals 1"
else
    #define message "x does not equal 1"

will cause all sorts of problems as they are PREPROCESSOR directives -> ie these get processed before compilation and dont affect the running of the program.

[vegaseat]

it might have been confusion of namespaces? surely <stdio.h> should be <cstdio> for namespace std. and vega is right too, that macro needed to be global. only #ifdef / #ifndef / #endif can be in executable statement blocks (i think anyway, there may be others). For example

if(x == 1)
    #define message "x equals 1"
else
    #define message "x does not equal 1"

will cause all sorts of problems as they are PREPROCESSOR directives -> ie these get processed before compilation and dont affect the running of the program.

I got out the old Deitel from the college days and looked up the rules for a MACRO. Whatever it expands to, if it looks right it is right! No wonder the old prof hated them, it was a way the huns could get even with him.

If you follow the vexing include trail of the iostream header, you will eventually find out that it actually uses stdio.h!!!

[1o0oBhP]

so

#include <iostream>
#include <cstdio>

is equivalent to just including iostream? i beg to differ. Ive included iostream before and still needed to include stdio for some functions, unless it was another error....

[vegaseat]

so

#include <iostream>
#include <cstdio>

is equivalent to just including iostream? i beg to differ. Ive included iostream before and still needed to include stdio for some functions, unless it was another error....

I am saying stdio.h, not cstdio, is in iostream in a convoluted way. Just bring it up in your editor and follow the yellow brick road through the includes. If you hum the tune along with the search it might help.

[1o0oBhP]

ah ok. got it.

[giegiey]

why i got

Warning

Poject is not compiled . something wrong with my project??
plss help . ? :( . this is my first project

#include <iostream>
#include <windows.h>
using namespace std;
int main(int argc, char *argv[])
{
system("title (Z)X-Giegiey-X(Z)");
system("color 5f");
system("CLS");


begin:

int a=0, b=0;
string process;

cout<< "Number one : ";
cin>>a;
cout<< "Process : ";
cin>>process;
cout<< "Number two : ";
cin>>b;

if (process=="+"){
cout<<a<<" "<<process<<" "<<b<<" = "<<a+b<<endl;
Beep(1000,100);
goto begin;
}
else if (process=="-") {
cout<<a<<" "<<process<<" "<<b<<" = "<<a-b<<endl;
Beep(1000,100);
goto begin;
}
else if (process=="*") {
cout<<a<<" "<<process<<" "<<b<<" = "<<a*b<<endl;
Beep(1000,100);
goto begin;
}
else if (process=="/") {
cout<<a<<" "<<process<<" "<<b<<" = "<<a/b<<endl;
Beep(1000,100);
goto begin;
}
else {
cout<<"The process is wrong !!!\n";
cout<<"Closing after 3 seconds ...\n";
Sleep(1000);
cout<<"Second 1 .\n";
Sleep(1000);
cout<<"Second 2 ..\n";
Sleep(1000);
cout<<"Second 3 ...\n";
cout<<"Closing now ...\n";
cout<<"bye ....\n";
Sleep(2900);
system("CLS");
return 0;
}

system("PAUSE");
return 0;
}