Compiler Issues For Assignment
I need help with this assignment. It had some compiler issues on it, some of which I managed to fix, but there are others I don't understand. The code is long, but the majority of it was made by the instructor and doesn't need to be bothered with. There's plenty of notes indicating what I coded and what he coded to test it.
This is the code:
This is the code:
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And this is the compile error.
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Thanks for your patience. ^^;
error: no matching function for call to ‘std::basic_string<char>::at()’
upper = str.at() >= 'A' && str.at() <= 'Z';
note: candidate expects 1 argument, 0 provided |
http://www.cplusplus.com/reference/string/string/at/
| Get character in string Returns a reference to the character at position pos in the string. |
you need to specify the index of the character that you want
warning: suggest parentheses around assignment used as truth value [-Wparentheses] if(caps="true") |
= is assignment
== is comparison
error: too few arguments to function ‘std::string BuildMessage(std::string, bool)’
yours = BuildMessage("hello");
error: too few arguments to function ‘std::string BuildMessage(std::string, bool)’
yours = BuildMessage(); |
The documentation says that BuilMessage provides defaults arguments.
However, that is not implemented
Change the prototype to
string BuildMessage(string str="", bool caps=false);In function ‘int FindLarger(int, int)’: lab_5.cpp:87:1: warning: control reaches end of non-void function |
¿what are you returning if the numbers are equivalent?
| What does you mean by "the index" of the character? |
Consider
string str = "Hello World"; How do you refer to, say, the 'e' character? The answer is that you refer to it by an index number. In C++ strings, the first character has index 0. The second has index 1, etc. You have to pass the index number to the at() method to tell it which character you're referring to, so in this example, str.at(1) is the 'e' character.
Other issues:
- Each of the professor's comments about the functions ends with
and down below is your definition:
- Read the prof's descriptions carefully and follow them exactly. For example, the Hello()function says
Your code displays "hello world!\n"
- Hello should be capitalized
- there should not be a newline
Programming is not like most other disciplines. It is all about being very precise.
The next function is PrintMessage(). The description includes
but your prototype is
- the parameter is not const
- the parameter is not call by reference
You don't need to assign a value to variable to return it. For example, GetAnswer() can just be:
FindLarger() could benefit greatly from this.
- Each of the professor's comments about the functions ends with
// CODE HERE (FUNCTION PROTOTYPE) Then at line 160 it says // CODE HERE (FUNCTION DEFINITIONS) So the prof wants you to put all the prototypes at the top and the definitions down below. For example, up top you wantvoid Hello();and down below is your definition:
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- Read the prof's descriptions carefully and follow them exactly. For example, the Hello()function says
| Display "Hello world!" to stdout (no newline character after) |
- Hello should be capitalized
- there should not be a newline
Programming is not like most other disciplines. It is all about being very precise.
The next function is PrintMessage(). The description includes
| parameters: string message (const call-by-reference) |
void PrintMessage(string message)- the parameter is not const
- the parameter is not call by reference
You don't need to assign a value to variable to return it. For example, GetAnswer() can just be:
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FindLarger() could benefit greatly from this.
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