how to fix constant expression required in C++? [closed]

-4

I try to create a table wich contans a number choosen by user but it given me an error :

constant expression required

#include <iostream.h>

#include <conio.h>

main(){

clrscr();

int i,k,nval,pos=0,neg=0;

cout<<"Entrer Le nombre de valeur que vous voulez saisir nval = ";

cin>>nval;

int tab[nval];

for (i=0; i<nval; i++){

k=i+1;

cout<<"Le nombre la valeur numeros = "<<k<<"= ";

cin>>tab[i];

if (tab[i]>0) pos+=1;

else if (tab[i]<0) neg+=1;

}

cout<<"Le nombre des valeurs positives = "<<pos<<endl;

cout<<"Le nombre des valeurs negatives = "<<neg;

getch();

return 0;

}

is there any site to try directly the C++ codes ?.

asked Nov 24 '18 at 8:59

KOTL NIAS

closed as off-topic by llllllllll, Galik, πάντα ῥεῖ, Killzone Kid, gnat Nov 24 '18 at 11:14

This question appears to be off-topic. The users who voted to close gave this specific reason:

"This question was caused by a problem that can no longer be reproduced or a simple typographical error. While similar questions may be on-topic here, this one was resolved in a manner unlikely to help future readers. This can often be avoided by identifying and closely inspecting the shortest program necessary to reproduce the problem before posting." – πάντα ῥεῖ, Killzone Kid

If this question can be reworded to fit the rules in the help center, please edit the question.

1

If you format your code with consistent indentation other readers may find it easier to help you.

– Galik
Nov 24 '18 at 9:02

@KOTLNIAS Sorry. My 1st comment didn't apply. To declare the std I'd recommend you'll get a newer compiler. Also see: stackoverflow.com/questions/29329776/…

– πάντα ῥεῖ
Nov 24 '18 at 9:03

what you mean exactly?

– KOTL NIAS
Nov 24 '18 at 9:04

2

Anyway, you really should consider upgrading to a newer development environment. Turbo-C++ is from before C++ was standardized twenty years ago. Nothing but some of the basic syntax you learn with Turbo-C++ will be usable for any real work, you will have a lot of studying to do if you want to become a good programmer after this course. There are plenty of free compilers and environments that you can use, that are up to date with the latest standards and have very good editors and environments.

– Some programmer dude
Nov 24 '18 at 9:06

2

Don't use TurboC. Use a C++11 conforming compiler like GCC

– Basile Starynkevitch
Nov 24 '18 at 9:16

|
show 6 more comments

-4

I try to create a table wich contans a number choosen by user but it given me an error :

constant expression required

#include <iostream.h>

#include <conio.h>

main(){

clrscr();

int i,k,nval,pos=0,neg=0;

cout<<"Entrer Le nombre de valeur que vous voulez saisir nval = ";

cin>>nval;

int tab[nval];

for (i=0; i<nval; i++){

k=i+1;

cout<<"Le nombre la valeur numeros = "<<k<<"= ";

cin>>tab[i];

if (tab[i]>0) pos+=1;

else if (tab[i]<0) neg+=1;

}

cout<<"Le nombre des valeurs positives = "<<pos<<endl;

cout<<"Le nombre des valeurs negatives = "<<neg;

getch();

return 0;

}

is there any site to try directly the C++ codes ?.

asked Nov 24 '18 at 8:59

KOTL NIAS

closed as off-topic by llllllllll, Galik, πάντα ῥεῖ, Killzone Kid, gnat Nov 24 '18 at 11:14

This question appears to be off-topic. The users who voted to close gave this specific reason:

"This question was caused by a problem that can no longer be reproduced or a simple typographical error. While similar questions may be on-topic here, this one was resolved in a manner unlikely to help future readers. This can often be avoided by identifying and closely inspecting the shortest program necessary to reproduce the problem before posting." – πάντα ῥεῖ, Killzone Kid

If this question can be reworded to fit the rules in the help center, please edit the question.

1

If you format your code with consistent indentation other readers may find it easier to help you.

– Galik
Nov 24 '18 at 9:02

@KOTLNIAS Sorry. My 1st comment didn't apply. To declare the std I'd recommend you'll get a newer compiler. Also see: stackoverflow.com/questions/29329776/…

– πάντα ῥεῖ
Nov 24 '18 at 9:03

what you mean exactly?

– KOTL NIAS
Nov 24 '18 at 9:04

2

Anyway, you really should consider upgrading to a newer development environment. Turbo-C++ is from before C++ was standardized twenty years ago. Nothing but some of the basic syntax you learn with Turbo-C++ will be usable for any real work, you will have a lot of studying to do if you want to become a good programmer after this course. There are plenty of free compilers and environments that you can use, that are up to date with the latest standards and have very good editors and environments.

– Some programmer dude
Nov 24 '18 at 9:06

2

Don't use TurboC. Use a C++11 conforming compiler like GCC

– Basile Starynkevitch
Nov 24 '18 at 9:16

|
show 6 more comments

-4

I try to create a table wich contans a number choosen by user but it given me an error :

constant expression required

#include <iostream.h>

#include <conio.h>

main(){

clrscr();

int i,k,nval,pos=0,neg=0;

cout<<"Entrer Le nombre de valeur que vous voulez saisir nval = ";

cin>>nval;

int tab[nval];

for (i=0; i<nval; i++){

k=i+1;

cout<<"Le nombre la valeur numeros = "<<k<<"= ";

cin>>tab[i];

if (tab[i]>0) pos+=1;

else if (tab[i]<0) neg+=1;

}

cout<<"Le nombre des valeurs positives = "<<pos<<endl;

cout<<"Le nombre des valeurs negatives = "<<neg;

getch();

return 0;

}

is there any site to try directly the C++ codes ?.

asked Nov 24 '18 at 8:59

KOTL NIAS

I try to create a table wich contans a number choosen by user but it given me an error :

constant expression required

#include <iostream.h>

#include <conio.h>

main(){

clrscr();

int i,k,nval,pos=0,neg=0;

cout<<"Entrer Le nombre de valeur que vous voulez saisir nval = ";

cin>>nval;

int tab[nval];

for (i=0; i<nval; i++){

k=i+1;

cout<<"Le nombre la valeur numeros = "<<k<<"= ";

cin>>tab[i];

if (tab[i]>0) pos+=1;

else if (tab[i]<0) neg+=1;

}

cout<<"Le nombre des valeurs positives = "<<pos<<endl;

cout<<"Le nombre des valeurs negatives = "<<neg;

getch();

return 0;

}

is there any site to try directly the C++ codes ?.

c++ turbo-c++

asked Nov 24 '18 at 8:59

KOTL NIAS

asked Nov 24 '18 at 8:59

KOTL NIAS

asked Nov 24 '18 at 8:59

KOTL NIAS

asked Nov 24 '18 at 8:59

KOTL NIAS

asked Nov 24 '18 at 8:59

KOTL NIAS

closed as off-topic by llllllllll, Galik, πάντα ῥεῖ, Killzone Kid, gnat Nov 24 '18 at 11:14

This question appears to be off-topic. The users who voted to close gave this specific reason:

"This question was caused by a problem that can no longer be reproduced or a simple typographical error. While similar questions may be on-topic here, this one was resolved in a manner unlikely to help future readers. This can often be avoided by identifying and closely inspecting the shortest program necessary to reproduce the problem before posting." – πάντα ῥεῖ, Killzone Kid

If this question can be reworded to fit the rules in the help center, please edit the question.

closed as off-topic by llllllllll, Galik, πάντα ῥεῖ, Killzone Kid, gnat Nov 24 '18 at 11:14

This question appears to be off-topic. The users who voted to close gave this specific reason:

"This question was caused by a problem that can no longer be reproduced or a simple typographical error. While similar questions may be on-topic here, this one was resolved in a manner unlikely to help future readers. This can often be avoided by identifying and closely inspecting the shortest program necessary to reproduce the problem before posting." – πάντα ῥεῖ, Killzone Kid

If this question can be reworded to fit the rules in the help center, please edit the question.

1

If you format your code with consistent indentation other readers may find it easier to help you.

– Galik
Nov 24 '18 at 9:02

@KOTLNIAS Sorry. My 1st comment didn't apply. To declare the std I'd recommend you'll get a newer compiler. Also see: stackoverflow.com/questions/29329776/…

– πάντα ῥεῖ
Nov 24 '18 at 9:03

what you mean exactly?

– KOTL NIAS
Nov 24 '18 at 9:04

2

Anyway, you really should consider upgrading to a newer development environment. Turbo-C++ is from before C++ was standardized twenty years ago. Nothing but some of the basic syntax you learn with Turbo-C++ will be usable for any real work, you will have a lot of studying to do if you want to become a good programmer after this course. There are plenty of free compilers and environments that you can use, that are up to date with the latest standards and have very good editors and environments.

– Some programmer dude
Nov 24 '18 at 9:06

2

Don't use TurboC. Use a C++11 conforming compiler like GCC

– Basile Starynkevitch
Nov 24 '18 at 9:16

|
show 6 more comments

1

If you format your code with consistent indentation other readers may find it easier to help you.

– Galik
Nov 24 '18 at 9:02

@KOTLNIAS Sorry. My 1st comment didn't apply. To declare the std I'd recommend you'll get a newer compiler. Also see: stackoverflow.com/questions/29329776/…

– πάντα ῥεῖ
Nov 24 '18 at 9:03

what you mean exactly?

– KOTL NIAS
Nov 24 '18 at 9:04

2

Anyway, you really should consider upgrading to a newer development environment. Turbo-C++ is from before C++ was standardized twenty years ago. Nothing but some of the basic syntax you learn with Turbo-C++ will be usable for any real work, you will have a lot of studying to do if you want to become a good programmer after this course. There are plenty of free compilers and environments that you can use, that are up to date with the latest standards and have very good editors and environments.

– Some programmer dude
Nov 24 '18 at 9:06

2

Don't use TurboC. Use a C++11 conforming compiler like GCC

– Basile Starynkevitch
Nov 24 '18 at 9:16

If you format your code with consistent indentation other readers may find it easier to help you.

– Galik
Nov 24 '18 at 9:02

@KOTLNIAS Sorry. My 1st comment didn't apply. To declare the std I'd recommend you'll get a newer compiler. Also see: stackoverflow.com/questions/29329776/…

– πάντα ῥεῖ
Nov 24 '18 at 9:03

what you mean exactly?

– KOTL NIAS
Nov 24 '18 at 9:04

Anyway, you really should consider upgrading to a newer development environment. Turbo-C++ is from before C++ was standardized twenty years ago. Nothing but some of the basic syntax you learn with Turbo-C++ will be usable for any real work, you will have a lot of studying to do if you want to become a good programmer after this course. There are plenty of free compilers and environments that you can use, that are up to date with the latest standards and have very good editors and environments.

– Some programmer dude
Nov 24 '18 at 9:06

Don't use TurboC. Use a C++11 conforming compiler like GCC

– Basile Starynkevitch
Nov 24 '18 at 9:16

|
show 6 more comments

1 Answer
1

active

oldest

votes

You can't create an array with a variable size unknown at compile time. You could try creating an array in heap memory instead.

int *tab = new int[nval];

But then you will have to free it after using.

delete tab;

answered Nov 24 '18 at 9:11

Victor

350413

it's working thank you!!

– KOTL NIAS
Nov 24 '18 at 9:14

You're welcome. Just don't forget to call delete after you're done with this array, otherwise you will lose (leak) memory.

– Victor
Nov 24 '18 at 9:16

1

@KOTLNIAS if this answers/solves your question (which it does) you should accept it as such for letting others to see your issue is solved by this ... That is done by clicking on the check icon near the answer score ...

– Spektre
Nov 24 '18 at 9:24

add a comment |

1 Answer
1

active

oldest

votes

1 Answer
1

active

oldest

votes

You can't create an array with a variable size unknown at compile time. You could try creating an array in heap memory instead.

int *tab = new int[nval];

But then you will have to free it after using.

delete tab;

answered Nov 24 '18 at 9:11

Victor

350413

it's working thank you!!

– KOTL NIAS
Nov 24 '18 at 9:14

You're welcome. Just don't forget to call delete after you're done with this array, otherwise you will lose (leak) memory.

– Victor
Nov 24 '18 at 9:16

1

@KOTLNIAS if this answers/solves your question (which it does) you should accept it as such for letting others to see your issue is solved by this ... That is done by clicking on the check icon near the answer score ...

– Spektre
Nov 24 '18 at 9:24

add a comment |

You can't create an array with a variable size unknown at compile time. You could try creating an array in heap memory instead.

int *tab = new int[nval];

But then you will have to free it after using.

delete tab;

answered Nov 24 '18 at 9:11

Victor

350413

it's working thank you!!

– KOTL NIAS
Nov 24 '18 at 9:14

You're welcome. Just don't forget to call delete after you're done with this array, otherwise you will lose (leak) memory.

– Victor
Nov 24 '18 at 9:16

1

@KOTLNIAS if this answers/solves your question (which it does) you should accept it as such for letting others to see your issue is solved by this ... That is done by clicking on the check icon near the answer score ...

– Spektre
Nov 24 '18 at 9:24

add a comment |

You can't create an array with a variable size unknown at compile time. You could try creating an array in heap memory instead.

int *tab = new int[nval];

But then you will have to free it after using.

delete tab;

answered Nov 24 '18 at 9:11

Victor

350413

You can't create an array with a variable size unknown at compile time. You could try creating an array in heap memory instead.

int *tab = new int[nval];

But then you will have to free it after using.

delete tab;

answered Nov 24 '18 at 9:11

Victor

350413

answered Nov 24 '18 at 9:11

Victor

350413

answered Nov 24 '18 at 9:11

Victor

350413

answered Nov 24 '18 at 9:11

Victor

350413

it's working thank you!!

– KOTL NIAS
Nov 24 '18 at 9:14

You're welcome. Just don't forget to call delete after you're done with this array, otherwise you will lose (leak) memory.

– Victor
Nov 24 '18 at 9:16

1

@KOTLNIAS if this answers/solves your question (which it does) you should accept it as such for letting others to see your issue is solved by this ... That is done by clicking on the check icon near the answer score ...

– Spektre
Nov 24 '18 at 9:24

add a comment |

it's working thank you!!

– KOTL NIAS
Nov 24 '18 at 9:14

You're welcome. Just don't forget to call delete after you're done with this array, otherwise you will lose (leak) memory.

– Victor
Nov 24 '18 at 9:16

1

@KOTLNIAS if this answers/solves your question (which it does) you should accept it as such for letting others to see your issue is solved by this ... That is done by clicking on the check icon near the answer score ...

– Spektre
Nov 24 '18 at 9:24

it's working thank you!!

– KOTL NIAS
Nov 24 '18 at 9:14

You're welcome. Just don't forget to call delete after you're done with this array, otherwise you will lose (leak) memory.

– Victor
Nov 24 '18 at 9:16

@KOTLNIAS if this answers/solves your question (which it does) you should accept it as such for letting others to see your issue is solved by this ... That is done by clicking on the check icon near the answer score ...

– Spektre
Nov 24 '18 at 9:24

add a comment |

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