vectors and string copy

[jchimanzi]

I am doing private studies on c++ and have no tutors. Can someone help me with the following. I will write exams end of the year in c++

4. how can one write a c++ programme which does the following

a create a vector of size 1000 and have it store the values 0.1, 1.1, 2.1, 3.1,....999.1

b trucate the vector to a size of 5

c print out how many values the vector is storing

d empty out the vector so that it stores no values


5. rewrite the following code correcting all problems found

void calculatevalues (const int &a, float *b, int &c)

{
d = 20.4;

if (*a =0)

*a += 1
c = a +d;

else

b= c/d ;

c= a- b +d;

}

Hint if a =4, b =0.0 and c=5 when this function is called, their values when this fucntion returns should be a=4, b=0.25 and c= 24.15

6 a The string class in the standard c++ library is a template for any type character of character representation.

write a function called copy which takes two parameters of the string type. The first parameter is the source string ( or the string to be copied) and the second parameter is the target string ( or the string that recieves the copy). This function need not return anything.

One is not allowed to use the fuction strcpy (.....)!

[Ganon11]

What have you done on your own to solve these problems?

[jchimanzi]

What have you done on your own to solve these problems?

This is what i have done:

a) .# include < iostream>
   #include < vector>
int main ()
 
{
     vector <int> ( 1000)
 
 
     }
 
b) truncate vector to size of 5
 
# include < iostream>
# include  <vector>
 
int main ()
 
{
  vector <int> jc (1000)
 
     jc.resize (5)
 
cout << jc.size ();
   }
 
c) print out how many values in vector file
 
# include < iostream>
# include  <vector>
 
int main ()
 
{
  vector <int> (1000)
    cout << " size () returns " < size () << endl;
 
  }
 
d Print so that it stores no vector
 
 
# include < iostream>
# include  <vector>
 
int main ()
{
 
 vector <int>  jc (1000)
jc.clear ()
 
cout<< jc.size (); prints 0
 
6.
{
 if (a==0)
 
else 
  b= c/d
}

[jchimanzi]

a) .# include < iostream>
   #include < vector>
int main ()
 
{
     vector <int> ( 1000)
 
 
     }
 
b) truncate vector to size of 5
 
# include < iostream>
# include  <vector>
 
int main ()
 
{
  vector <int> jc (1000)
 
     jc.resize (5)
 
cout << jc.size ();
   }
 
c) print out how many values in vector file
 
# include < iostream>
# include  <vector>
 
int main ()
 
{
  vector <int> (1000)
    cout << " size () returns " < size () << endl;
 
  }
 
d Print so that it stores no vector
 
 
# include < iostream>
# include  <vector>
 
int main ()
{
 
 vector <int>  jc (1000)
jc.clear ()
 
cout<< jc.size (); prints 0

[jchimanzi]

What have you done on your own to solve these problems?

I am doing private studies on c++ and have no tutors. Can someone help me with the following. I will write exams end of the year in c++. see the answers that i have tried to write right at the end

4. how can one write a c++ programme which does the following

a create a vector of size 1000 and have it store the values 0.1, 1.1, 2.1, 3.1,....999.1

b trucate the vector to a size of 5

c print out how many values the vector is storing

d empty out the vector so that it stores no values


5. rewrite the following code correcting all problems found

void calculatevalues (const int &a, float *b, int &c)

{
d = 20.4;

if (*a =0)

*a += 1
c = a +d;

else

b= c/d ;

c= a- b +d;

}

Hint if a =4, b =0.0 and c=5 when this function is called, their values when this fucntion returns should be a=4, b=0.25 and c= 24.15

6 a The string class in the standard c++ library is a template for any type character of character representation.

write a function called copy which takes two parameters of the string type. The first parameter is the source string ( or the string to be copied) and the second parameter is the target string ( or the string that recieves the copy). This function need not return anything.

One is not allowed to use the fuction strcpy (.....)!


answers


5 i) .# include < iostream>
#include < vector>
int main ()
{
Vector <int> jc;
Jc. Resize (1000);
Jc[ 1000-1] = 999.1;
}

ii) //Truncate vector file to size of 5
# include <iostream>
# include < vector>
Int main ()
{
Vector <int> jc (1000);
Jc.resize (5);
Cout << jc.size ();
}

iii) //print how many vector is storing
# include <iostream>
# include < vector>
Int main ()
{
Vector <int> (1000);
Cout << “ size () returns “ < size () << endl;
}
iv) // Empty the vector file
# include <iostream>
# include < vector>
Int main
{
Vector <int> jc (1000);
Jc.clear ();
Cout << jc.size (); // prints 0
}

7. Instead of using the

#include <list>
#include <vector>
#include <iostream>

int main()

[MMcCarthy]

I have merged two of your threads together that have the same subject matter. This may lead to some duplication of posts. If you would like some of the posts deleted reply and tell me which numbers to delete.

Please don't double post.

ADMIN

[jchimanzi]

I have merged two of your threads together that have the same subject matter. This may lead to some duplication of posts. If you would like some of the posts deleted reply and tell me which numbers to delete.

Please don't double post.

ADMIN

can remove the second one
regards