need help to fix that | C++ | Page 1

shadow stratus Sep 17, 2023, 6:17 AM

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so you want to manually input a line of text and the program repeats what you typed?

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#include <iostream>
#iclude <string>

void printText(){
std::getline(std::cin, printText);
std::cout <<printText;
}

int main(){
printText();
}

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something like that maybe?

lethal folio Sep 17, 2023, 7:23 AM

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#incude <iostream> then?

shadow stratus Sep 17, 2023, 8:32 AM

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yes

shadow stratus Sep 17, 2023, 1:52 PM

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yes, in main you mention printext instead of printText

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oh nevermind

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could you send the error message?

slate widget Sep 17, 2023, 1:56 PM

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#include <iostream>

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its a systemic lib

shadow stratus Sep 17, 2023, 1:56 PM

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is this in C or in C++? because C++ needs a class, usualy you would use main as class and printext would become a method within that class

slate widget Sep 17, 2023, 1:57 PM

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also getline buffer is incorrect

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ur setting it as the function

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it should be a char array instead

shadow stratus Sep 17, 2023, 1:59 PM

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oh and i just noticed you used prinText for method name as well as the string name(wich you didn't initialize)

slate widget Sep 17, 2023, 2:00 PM

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slate widget also `getline` buffer is incorrect

.

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;compile

#include <iostream>

void prinText(){
  char text[1024];
  std::getline(std::cin, text);
  std::cout << text << std::endl;
}

int main(){
    prinText();
    return 0;
}

quasi forgeBOT Sep 17, 2023, 2:01 PM

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Compiler Output

<source>: In function 'void prinText()':
<source>:5:15: error: no matching function for call to 'getline(std::istream&, char [1024])'
    5 |   std::getline(std::cin, text);
      |   ~~~~~~~~~~~~^~~~~~~~~~~~~~~~
In file included from /opt/compiler-explorer/gcc-13.2.0/include/c++/13.2.0/string:55,
                 from /opt/compiler-explorer/gcc-13.2.0/include/c++/13.2.0/bits/locale_classes.h:40,
                 from /opt/compiler-explorer/gcc-13.2.0/include/c++/13.2.0/bits/ios_base.h:41,
                 from /opt/compiler-explorer/gcc-13.2.0/include/c++/13.2.0/ios:44,
                 from /opt/compiler-explorer/gcc-13.2.0/include/c++/13.2.0/ostream:40,
                 from /opt/compiler-explorer/gcc-13.2.0/include/c++/13.2.0/iostream:41,
                 from <source>:1:
/opt/compiler-explorer/gcc-13.2.0/include/c++/13.2.0/bits/basic_string.tcc:893:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::basic_istream<_CharT, _Traits>& std::getline(basic_is

slate widget Sep 17, 2023, 2:02 PM

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its a function

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not a name

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;compile

#include <iostream>
#include <string>
void prinText(){
  char text[1024];
  std::getline(std::cin, text);
  std::cout << text << std::endl;
}

int main(){
    prinText();
    return 0;
}

quasi forgeBOT Sep 17, 2023, 2:02 PM

#

Compiler Output

<source>: In function 'void prinText()':
<source>:5:15: error: no matching function for call to 'getline(std::istream&, char [1024])'
    5 |   std::getline(std::cin, text);
      |   ~~~~~~~~~~~~^~~~~~~~~~~~~~~~
In file included from /opt/compiler-explorer/gcc-13.2.0/include/c++/13.2.0/string:55,
                 from /opt/compiler-explorer/gcc-13.2.0/include/c++/13.2.0/bits/locale_classes.h:40,
                 from /opt/compiler-explorer/gcc-13.2.0/include/c++/13.2.0/bits/ios_base.h:41,
                 from /opt/compiler-explorer/gcc-13.2.0/include/c++/13.2.0/ios:44,
                 from /opt/compiler-explorer/gcc-13.2.0/include/c++/13.2.0/ostream:40,
                 from /opt/compiler-explorer/gcc-13.2.0/include/c++/13.2.0/iostream:41,
                 from <source>:1:
/opt/compiler-explorer/gcc-13.2.0/include/c++/13.2.0/bits/basic_string.tcc:893:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::basic_istream<_CharT, _Traits>& std::getline(basic_is

slate widget Sep 17, 2023, 2:02 PM

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oh

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nvm

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it expects an input lmfao

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try my code ive given u

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it should work

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the buffer is correct now

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what is it

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getline expects a buffer where the text is supposed to be written, ur input

shadow stratus Sep 17, 2023, 2:04 PM

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he made text char array

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@slate widget is there a reason to use char array in stead of string?

slate widget Sep 17, 2023, 2:05 PM

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shadow stratus <@1093384210238148690> is there a reason to use char array in stead of string?

its the same

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string just holds the char array and modifies it

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according to ur needs

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why?

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??

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can u just provide me the error

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just copy paste the error lmao

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or atleast take a screenshot

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ah

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so its a must to have a string obj

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#include <iostream>
#include <string>
void prinText(){
  std::string text;
  std::getline(std::cin, text);
  std::cout << text << std::endl;
}

int main(){
    prinText();
    return 0;
}

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try now

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read the error lmao

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mismatched types

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read it

shadow stratus Sep 17, 2023, 2:13 PM

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no problem

slate widget Sep 17, 2023, 2:13 PM

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u should read the docs tho

shadow stratus Sep 17, 2023, 2:14 PM

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i m just a bit confused as to why it does not accept char arrays but string is fine

slate widget Sep 17, 2023, 2:14 PM

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shadow stratus i m just a bit confused as to why it does not accept char arrays but string is f...

the function just requires it

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https://en.cppreference.com/w/cpp/string/basic_string/getline

cpp/string/basic string/getline

#need help to fix that