C/C++ Two question on string access ops c++

[ineedhelpnow]

Assign the size of userInput to stringSize. Ex: if userInput = "Hello", output is:

Size of userInput: 5
Sample program:

#include <iostream>
#include <string>
using namespace std;

int main() {
   string userInput;
   int stringSize = 0;

   userInput = "Hello"; 
   <STUDENT CODE>

   cout << "Size of userInput: " << stringSize << endl;

   return 0;
}

Write an expression to detect that the first character of userInput matches firstLetter.

Sample program:

#include <iostream>
#include <string> 
using namespace std;

int main() {
   string userInput;
   char firstLetter = '-';

   userInput = "banana";
   firstLetter = 'b';

   if (<STUDENT CODE>) { 
      cout << "Found match: " << firstLetter << endl;
   }
   else {
      cout << "No match: " << firstLetter << endl;
   }

   return 0;
}

kinda lost. any hints on where to start?

 

[MarkFL]

If I recall correctly, C and its variants/derivatives use the [m]strlen()[/m] function to determine the length of a string...where the string variable is the function's parameter.

 

[I like Serena]

If I recall correctly, C and its variants/derivatives use the [m]strlen()[/m] function to determine the length of a string...where the string variable is the function's parameter.

I don't think the old C style string functions should be used here.

The length of [m]string[/m] in C++ should be retrieved with either its [m]size()[/m] or its [m]length()[/m] method.
See for instance here for a reference.

 

[ineedhelpnow]

what do i need the string length for?

 

[I like Serena]

what do i need the string length for?

Because your problem statement asks you to "Assign the size of userInput to stringSize".
Note that "length" and "size" are interchangeable functions here.