Why when i run the program the error say that i cant use it as a function

Question

Exp totalrent=calcrent() error: calcrent cannot be use as function

Answer 1

There is so much wrong with the code I don't really know where to start to help you. I'm trying to make sense out of it, but not sure of your intent in some places. I guess we can start with the main function.

First, I would suggest that you try to declare you variables as close to where they are first needed as possible. This will greatly reduce errors and increase readability, especially while you're learning. Also, use spacing to your advantage to make you code more readable for yourself and others.

Second, a function prototype consists of its modifiers, return type, and signature. So, for your current price1 function:
void price1(int quantity, double priceU);
would be its prototype. Notice it ends with a semi-colon and doesn't include its body (everything between the curly braces and the braces themselves)

Third, you don't declare the name of a function as a variable as well. You had calcrent, price1, price2, and totalmenu all declared as a float as well as a function. This will create a naming conflict and lead to errors.

Fourth, you also have declares and set a couple a variables within the main function that are not used within this function.

Fifth, you also have a couple of variables that are declared and then used prior to ever having a value set to them.

Sixth, you have:
return 0;
system ("pause");
outside of any function/class etc at the end of your code.
return 0; looks like it should be the last line in your main function.
system("pause") will never be reached since it comes directly after a return statement.

I've cleaned up the main function a bit and added some comments to show a couple of issues that remain. Look at the code to see the differences in readability, what has been removed, and what has been changed. I suggest you write out some notes in pseudo code so that you can refer to how it is your code should work and flow. Then write small amounts of code and test that it works the way it should before writing another small chunk and testing it.

......

Answer 2

open a window/tab in your browser
go to https://www.sololearn.com
click on Sign In
enter the same login email and password you use for the app.
click Sign In
This should take you to your profile page
scroll down to My Codes
click + New Code
this will open the code playground in a new tab/window
select the language of the code that you want by clicking where it says HTML/CSS/JS unless you want web code in which case it is already selected.
copy and paste your code into the editor
click the Save button at the bottom of the page
give your code a name
click the public switch
click save
now click on the Share button to the right above the output window
copy the link that is given
click on the Discuss button at the top of the page
this will open the forum in a new tab/window
here you can click on the My Questions tab and find this post
scroll down to the New Answer box and paste the link to your code
click post

Answer 3

Ok, so it looks like you are trying to set a value to a variable from a function that has a void return type.

void calcrent( )

Answer 4

Also, as @Corentin has stated you'll need to either rearrange your code or provide a prototype prior to the main function so that it is known to exist before it's use. I'll go over the code and post some needed changes if there are any more.

Answer 5

int main() {

int MR;
cout << "Please Enter Monthly Rent" << endl;
cin >> MR;

int qty;
cout << "Please Enter Quantity" << endl;
cin >> qty;

float priceU;
cout << "Please Enter Price Per Unit" << endl;
cin >> priceU;

int numS; // numS is set here but never used!
cout << "Please Enter Number of serving" << endl;
cin >> numS;

float priceS; // priceS is set here but never used!
cout << "Please Enter Price Per Serving" << endl;
cin >> priceS;

char Smenu;
cout << "Please Enter Set Menu" << endl;
cin >> Smenu;

int numSmenu;
cout << "Please Enter Number Of Set Menu" << endl;
cin >> numSmenu;

float totalR = calcrent(MR); // I'm guessing you really want to pass MR to this func
float totalPrice = price1(qty, priceU);
float totP = price2( );
float totalM = totalmenu(Smenu, numSmenu);

float totalP, sum; // These are used, but never set

cout << "Total Price Per Serving after discount:" << totalP << endl;
cout << "Total Price:" << sum << endl;

return 0;
}

Answer 6

Can you provide a link to the rest of the code.

Answer 7

Nope, I don't use it. lol Also, this is a community of coders and programmers. Others may be able to help you as well. If you have the code saved in the playground, make it public and post a link to it here so we can help you. Otherwise, you can upload it somewhere such as github etc and post the link to the project.

Answer 8

Copy and paste it in the code playground, then post a link.

Answer 9

Login to the website in your browser on your laptop.

Answer 10

www.sololearn.com
you log in with the same id/pass as in the app

Answer 11

done

Answer 12

OK. I think you have to define at least the prototype of that function before the main()

Answer 13

@ChaoticDawg thanks for the most helpful reply but please don't post your code as a comment, copy it in your playground and post a link, for the sake of comments readability.

Answer 14

thanks @chaoticDawg

Answer 15

can i get your whatsapp number.. i want to sent the coding

Answer 16

my coding in the laptop... so how can i upload it here

Answer 17

how can i do that?? i use this app in my hp and the coding in my laptop

Answer 18

what website

Answer 19

can you teach me

Answer 20

https://code.sololearn.com/ccdmnutq4HRA