[Error] no match for 'operator=' (operand types are 'std::string {aka std::basic_string<char>}' and 'void')

I wrote it, I was just wrong to read libraries

compiles fine for me now

#include <iostream> #include <string> #include <time.h> #include <windows.h> #include <stdio.h> #include <algorithm> using namespace std; //string PBOX1(string s) { // string s1; // s1 = random_shuffle(s.begin(), s.end()); // return s1; //} int main(int argc, char** argv) { string s1; cin >> s1; cout << s1; //string s2 = PBOX1(s1); string s2 = s1; random_shuffle(s2.begin(), s2.end()); cout << endl << s2; return 0; }

> [Error] no match for 'operator=' (operand types are 'std::string {aka std::basic_string<char>}' and 'void') Because random_shuffle() return void

does it work for you now?

Yes but even if I compile again random_shuffle always presents me the same exchange

not for me

s1 is the input and s2 the shuffled string

Yes but s2 is always 9203168457

even if you re-run, the same number should come out

is your input the same?

is your input the same?

Yes

:)

this is a side effect of the "random" numbers. you have to reset you pseudo random number generator, so you will get another output with the same input.

some functions provide an parameter wich is called seed, that seed number (usually your local time) is the magic number to recallibrate the pseudo random number generator

call srand(time(0)); before you use random_shuffle()

that should do it

https://stackoverflow.com/questions/14221763/stdrandom-shuffle-produces-same-result-each-time

Thanks, I'm trying now

NP, I tried it on my machine. Worked pretty well

If you are interested in <algorithm>, I can recommend you this video. A very good one from CppCon https://www.youtube.com/watch?v=2olsGf6JIkU

If you are interested in <algorithm>, I can recommend you this video. A very good one from CppCon https://www.youtube.com/watch?v=2olsGf6JIkU

This talk is great

This guy in general

@Shelly: Yeah, indeed. I'm a fan after this talk too. Andrei Alexandrescu has some very entertaining and cool videos too.

I followed your advice but the exchange is always the same as the previous string, that is the XOR

ähm... do you want to shuffle the characters of a string or the bits of a word. i am a bit confused right now

shuffle() or random_shuffle() do not shuffle the bits

only the single elements within a container/string

only the single elements within a container/string

I know but it can shuffle the position (the index)

If I use random_shuffle in the main, it work correctly

if I use it in one method it doesn't work anything

can you show me your current code?

yes

void PBOX1(string s){ srand (time(NULL)); random_shuffle(s.begin(),s.end()); } int main(int argc, char** argv) { string s4; cout<<"WORD : "; cin>>s4; PBOX1(s4); //doesn't work random_shuffle(s4.begin(),s4.end()); //work correctly cout<<"SHUFFLE : "<<s4; return 0; }

I see

void PBOX1(string s){

you pass the string as a copy, so you shuffle the copy, not the original

after you leave the function, the modification on the copy gets lost

try this one

Not void PBOX1(string s){ but void PBOX1(string &s){

you pass the string as a copy, so you shuffle the copy, not the original

can I pass by reference?

this way, you pass the parameter as a reference and you are going to modify the original

exactly, buddy :)

exact?

whaaaaaaaa !!!

:D

You made a pointer, not a reference ;)

Ahhh sorry

Try to make a reference with an ampercent &

;)

That trigger 😆But same here

@Shelly :D :D :D

Thanks a lot

Easy, buddy

You made a pointer, not a reference ;)

he didnt get the reference

youll have to give him a small pointer

yeah, perhaps

Lol

yeah, perhaps

Viktor is there a way to get the initial order back?

@NICOOH : Only if you make a copy before you make the shuffle. The is (unfortunatelly) no way to do a reverse shuffle

How to use termux

How to use termux

Only god knows

Only god knows

Its easy for linux working people..

Can somebody please help me to do c program in termux

Did some of corutils have been written in c++?

Does anyone have experience with raspberry pis

What is purpose of array in c language friend s any tell little bit about that

??

Purpose is a big question

Pls Tel small why using array

Like you have 10 variables, int a,b,c,d,e,f,g,h,i,j;

Purpose is a big question

Thk u for interst me

sometimes you just wanna group them up. int a[10];

Like you have 10 variables, int a,b,c,d,e,f,g,h,i,j;

Ok bro

hi

hello