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'Var' does not name a type!

1

I don't have much experience in C++ programming. I'm getting this error

'z' does not name a type!!!

which I have't seen in MATLAB or python... What's wrong??? It is so simple!!!

float x=10; float y=50; float z;
z=x*y;

void setup() 
 // put your setup code here, to run once:


void loop() 
 // put your main code here, to run repeatedly:

arduino-uno programming c++ error

share|improve this question

edited 6 hours ago

Michel Keijzers

7,13451939

asked 6 hours ago

2012User2012User

154

New contributor

2012User is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

add a comment | 

1

I don't have much experience in C++ programming. I'm getting this error

'z' does not name a type!!!

which I have't seen in MATLAB or python... What's wrong??? It is so simple!!!

float x=10; float y=50; float z;
z=x*y;

void setup() 
 // put your setup code here, to run once:


void loop() 
 // put your main code here, to run repeatedly:

arduino-uno programming c++ error

share|improve this question

edited 6 hours ago

Michel Keijzers

7,13451939

asked 6 hours ago

2012User2012User

154

New contributor

2012User is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

add a comment | 

I don't have much experience in C++ programming. I'm getting this error

'z' does not name a type!!!

which I have't seen in MATLAB or python... What's wrong??? It is so simple!!!

float x=10; float y=50; float z;
z=x*y;

void setup() 
 // put your setup code here, to run once:


void loop() 
 // put your main code here, to run repeatedly:

arduino-uno programming c++ error

share|improve this question

edited 6 hours ago

Michel Keijzers

7,13451939

asked 6 hours ago

2012User2012User

154

New contributor

2012User is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

float x=10; float y=50; float z;
z=x*y;

void setup() 
 // put your setup code here, to run once:


void loop() 
 // put your main code here, to run repeatedly:

share|improve this question

edited 6 hours ago

Michel Keijzers

7,13451939

asked 6 hours ago

2012User2012User

154

New contributor

2012User is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

share|improve this question

edited 6 hours ago

Michel Keijzers

7,13451939

asked 6 hours ago

2012User2012User

154

New contributor

2012User is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

edited 6 hours ago

Michel Keijzers

7,13451939

edited 6 hours ago

Michel Keijzers

7,13451939

asked 6 hours ago

2012User2012User

154

New contributor

2012User is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

asked 6 hours ago

2012User2012User

154

1 Answer
1

active

oldest

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4

You cannot put an expression statement outside a function. Only the variable declarations can be placed outside functions (and those variables are called globals/global variables).

Try the following:

float x=10; float y=50; float z;


void setup() 
 // put your setup code here, to run once:
 z=x*y;


void loop() 
 // put your main code here, to run repeatedly:

share|improve this answer

edited 1 hour ago

answered 6 hours ago

Michel KeijzersMichel Keijzers

7,13451939

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thank you. pretty much basic thing that I didn't know about C++.
  
  – 2012User
  6 hours ago
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  You can put an expression outside a function (e.g. float z=x*y; does have an expression x*y in it, and may appear in namespace scope). What you can't put there is an expression statement (or any other type of statements).
  
  – Ruslan
  5 hours ago
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @Ruslan Thanks for the clarification; I added the word statement in my answer.
  
  – Michel Keijzers
  1 hour ago
  

  
  
  
  

add a comment | 

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4

You cannot put an expression statement outside a function. Only the variable declarations can be placed outside functions (and those variables are called globals/global variables).

Try the following:

float x=10; float y=50; float z;


void setup() 
 // put your setup code here, to run once:
 z=x*y;


void loop() 
 // put your main code here, to run repeatedly:

share|improve this answer

edited 1 hour ago

answered 6 hours ago

Michel KeijzersMichel Keijzers

7,13451939

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thank you. pretty much basic thing that I didn't know about C++.
  
  – 2012User
  6 hours ago
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  You can put an expression outside a function (e.g. float z=x*y; does have an expression x*y in it, and may appear in namespace scope). What you can't put there is an expression statement (or any other type of statements).
  
  – Ruslan
  5 hours ago
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @Ruslan Thanks for the clarification; I added the word statement in my answer.
  
  – Michel Keijzers
  1 hour ago
  

  
  
  
  

add a comment | 

4

You cannot put an expression statement outside a function. Only the variable declarations can be placed outside functions (and those variables are called globals/global variables).

Try the following:

float x=10; float y=50; float z;


void setup() 
 // put your setup code here, to run once:
 z=x*y;


void loop() 
 // put your main code here, to run repeatedly:

share|improve this answer

edited 1 hour ago

answered 6 hours ago

Michel KeijzersMichel Keijzers

7,13451939

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thank you. pretty much basic thing that I didn't know about C++.
  
  – 2012User
  6 hours ago
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  You can put an expression outside a function (e.g. float z=x*y; does have an expression x*y in it, and may appear in namespace scope). What you can't put there is an expression statement (or any other type of statements).
  
  – Ruslan
  5 hours ago
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @Ruslan Thanks for the clarification; I added the word statement in my answer.
  
  – Michel Keijzers
  1 hour ago
  

  
  
  
  

add a comment | 

You cannot put an expression statement outside a function. Only the variable declarations can be placed outside functions (and those variables are called globals/global variables).

Try the following:

float x=10; float y=50; float z;


void setup() 
 // put your setup code here, to run once:
 z=x*y;


void loop() 
 // put your main code here, to run repeatedly:

share|improve this answer

edited 1 hour ago

answered 6 hours ago

Michel KeijzersMichel Keijzers

7,13451939

float x=10; float y=50; float z;


void setup() 
 // put your setup code here, to run once:
 z=x*y;


void loop() 
 // put your main code here, to run repeatedly:

share|improve this answer

edited 1 hour ago

answered 6 hours ago

Michel KeijzersMichel Keijzers

7,13451939

answered 6 hours ago

Michel KeijzersMichel Keijzers

7,13451939

answered 6 hours ago

Michel KeijzersMichel Keijzers

7,13451939