Program 3

[pacman169]

Hello,

I moved to exercise 4.

Declare a char variable called friend_sex and initialize its value to 0. Prompt the user to enter an m if the friend is male and an f if the friend is female. Assign the value entered to the variable friend_sex. Then use two if-statements to write the following:

If the friend is male, write "If you see friend_name please ask him to call me."

If the friend is female, write "If you see friend_name please ask her to call me."

Now I put some code together

 #include<iostream>
#include<string>
#include<vector>
#include<algorithm>
#include<cmath>
using namespace std;


int main()

{
      string friend_sex;               // friend_sex is a variable of type string
      cin>>friend_sex;                 // read characters into friend_sex
      char x=friend_sex;               // Declares a char variable called friend_sex
      x=0;                             // Initializes it`s value to 0
      cout<<"Enter m if your friend is male, if female enter n:\n";
      char m=friend_sex           // Assigns the value entered to the variable friend_sex
      char f=friend_sex

      if friend_sex=m cout<<"If you see friend_name please ask him to call me:\n";

      if friend_sex=f cout<<"If you see friend_name please ask her to call me:\n";

      // If-statements

} 

The compiler doesn`t accept it, does my code look right at all?

[wildblue]

The compiler is likely complaining about a few things.

In line 14, 17 and 18 - you're declaring a char variable and then assigning it the value of friend_sex, which you've declared to be a string.

line 17 and 18 - you're missing a semi-colon at the end of the statements (but you don't need these lines at all)

line 20 and 22 - check the syntax needed for if statements. You're missing some parenthesis. Also - if you want to see if something is equal to something, you need to use the equality operator ==, not the assignment operator =. And - if you're comparing with a char value - use single quotes around the character, e.g. 'm'.

That said,

I think you may have meant to make line 12 a string variable for friend_name, not friend_sex? And then get input to friend_name on line 13, and refer to the friend_name variable (not just "friend_name" as text) on lines 20 and 22.

Line 14/15 - I think you meant to just declare a char variable friend_sex and initialize it to '0'. There's no need for a separate x variable.

You don't need the vector, algorithm and cmath includes for this program.

[pacman169]

Thanks for your reply, I changed the code does it look better now?

 #include<iostream>
#include<string>
#include<vector>
#include<algorithm>
#include<cmath>
using namespace std;


int main()

{
      string friend_name;               // friend_name is a variable of type string
      cin>>friend_name;                 // read characters into friend name
      char friend_sex;                // friend_sex is a variable of type char
      cin>>friend_sex;                  // read characters into friend_sex
      char m=0;          // declaring a char variable friend_sex and initialize it to '0'
      char f=0;         // declaring a char variable friend_sex and initialize it to '0'
      cout<<"Enter the name of your friend :\n";
      cout<<"Enter m if your friend is male, if female enter n:\n";
      
                     
 

      if friend_sex==`m` cout<<"If you see friend_name please ask him to call me:\n";

      if friend_sex==`f` cout<<"If you see friend_name please ask her to call me:\n";

      // If-statements

} 

[AbstractionAnon]

Lines 24,26: You need () around your conditional expressions.

if (friend_sex=='m')

edit: You're also using the wrong single quote. You need then ' character not the ` character around your character literals.

[wildblue]

You don't need lines 16 and 17. The assignment wants you to initialize the variable you declare on line 14 to 0.

Line 18 should come before line 13 - so the prompt asking for friend name comes before the program waits for input.

Line 19 should come before line 15 - so the prompt asking for friend sex comes before the program waits for input.

Lines 24 and 26 - you need to break out friend_name from the text expressions if you want to pull the actual name stored in that variable.

cout<<"If you see " << friend_name << " please ask him to call me:\n";


Edit: and on line 19 - you want them to enter f for female, not n?