.

Hmm bro. what do you not understand in those codes ?

Lazy man!
Make we do your home work for you?

I think in 2, result will be displayed as 30.0. You declared num1 as integer. For num2, you should use double instead. //I'm not a c++ pro.

holyboss:
Please kindly help on the following question:

1. Explain the following code snippet

Fstream file
file.open(“/mydir/data.bin”, ios::in)
while(file)

2. Explain what the following code is doing?

#include <iostream>
using namespace std;
int main()
{
int num1 = 10;
float num2 = 20;
cout << sizeof(num1 + num2);
return 0;
}

The first one is like a flat-file database. Simply put Notepad.. It uses a notepad or text editor to store data even after the program stops running!! Enough of the explanation, the above program in number 1(one) is only trying to access a text document from the stipulated path name, the "while" statement checks if it really does exist.

2. Although I haven't debugged your codes but I think I have an idea of what that does, you see my friend when you actually want to determine the size of let's say a variable in the memory, such function could be used. In context to this program, it actually determines the memory size or actual size of each variables then proceeds by determining its arithmetic sum, of cause you know it provides the output!!!!


I hope this was of help to you!!! Have a nice day!!!

Your second code is wrong.

Why use int and float at the same time?

Code should have looked like this

#include <stdio.h>
int main()
{  
    Int num1;
    Int num2; 
    Int answer = num1 + num2; 
    Cout << "Answer "<<answer endl;
   return 0;
 }

Now the first one apparently u using ofstream(file stream) which you must include the header file

#include <fstream>

Ezechinwa:


The first one is like a flat-file database. Simply put Notepad.. It uses a notepad or text editor to store data even after the program stops running!! Enough of the explanation, the above program in number 1(one) is only trying to access a text document from the stipulated path name, the "while" statement checks if it really does exist.

2. Although I haven't debugged your codes but I think I have an idea of what that does, you see my friend when you actually want to determine the size of let's say a variable in the memory, such function could be used. In context to this program, it actually determines the memory size or actual size of each variables then proceeds by determining its arithmetic sum, of cause you know it provides the output!!!!


I hope this was of help to you!!! Have a nice day!!!

Using sizeof to add and using float? This code will produce powerful errors.

holyboss:
Please kindly help on the following question:

1. Explain the following code snippet

Fstream file
file.open(“/mydir/data.bin”, ios::in)
while(file)

2. Explain what the following code is doing?

#include <iostream>
using namespace std;
int main()
{
int num1 = 10;
float num2 = 20;
cout << sizeof(num1 + num2);
return 0;
}

How come no one has given a sensible answer to number 2?
Your code in number two adds your two variables. It promotes the int to a float (in order to enable the addition) and this results in an answer of type float. Thus, the sizeof operator gives you the size of a float, which on most architectures, is 4.

gimakon:
Your second code is wrong.

Why use int and float at the same time?

Code should have looked like this

#include <stdio.h>
int main()
{  
    Int num1;
    Int num2; 
    Int answer = num1 + num2; 
    Cout << "Answer "<<answer endl;
   return 0;
 }

Now the first one apparently u using ofstream(file stream) which you must include the header file

#include <fstream>

I am not a c++ geek but the system should be able to implicitly convert an int to a float or vice versa.
I think it returns the size of the number the answer in bits or something.my own guess

gimakon:


Using sizeof to add and using float? This code will produce powerful errors.

The code is correct, run it with DEV or CodeblocK, It will display 4

TOmmyJidex:
Lazy man!

Make we do your home work for you?

Bros wetin na!

mexzony:

I am not a c++ geek but the system should be able to implicitly convert an int to a float or vice versa.
I think it returns the size of the number the answer in bits or something.my own guess

Your contribution is appreciated, bro..

Diakon:



How come no one has given a sensible answer to number 2?
Your code in number two adds your two variables. It promotes the int to a float (in order to enable the addition) and this results in an answer of type float. Thus, the sizeof operator gives you the size of a float, which on most architectures, is 4.

Thanks man. Yal dah bomb!

gimakon:
Your second code is wrong.

Why use int and float at the same time?

Code should have looked like this

#include <stdio.h>
int main()
{  
    Int num1;
    Int num2; 
    Int answer = num1 + num2; 
    Cout << "Answer "<<answer endl;
   return 0;
 }

Now the first one apparently u using ofstream(file stream) which you must include the header file

#include <fstream>

Thanks man

codemarshal08:
Hmm bro. what do you not understand in those codes ?

It has been answered, thanks

Ezechinwa:


The first one is like a flat-file database. Simply put Notepad.. It uses a notepad or text editor to store data even after the program stops running!! Enough of the explanation, the above program in number 1(one) is only trying to access a text document from the stipulated path name, the "while" statement checks if it really does exist.

2. Although I haven't debugged your codes but I think I have an idea of what that does, you see my friend when you actually want to determine the size of let's say a variable in the memory, such function could be used. In context to this program, it actually determines the memory size or actual size of each variables then proceeds by determining its arithmetic sum, of cause you know it provides the output!!!!


I hope this was of help to you!!! Have a nice day!!!

Thanks Man

holyboss:
The code is correct, run it with DEV or CodeblocK, It will display 4

hmm

tdayof:
hmm

*coverFace*

longest time, what's upping??