@programminginc - страница 2919

i know it's a bit rude to join a group and immediately start asking for things, but i can't get over this problem .. I have to launch a file (for example chrome.exe) located in another directory. as long as the file is in the same directory there are no problems, I can use system ("chrome.exe"); I have tried in various ways, changing parameters and everything but I've never been able to launch any file . I also searched the internet but I don't have much experience so any help would be appreciated

Pavel

i know it's a bit rude to join a group and immediately start asking for things, but i can't get over this problem .. I have to launch a file (for example chrome.exe) located in another directory. as long as the file is in the same directory there are no problems, I can use system ("chrome.exe"); I have tried in various ways, changing parameters and everything but I've never been able to launch any file . I also searched the internet but I don't have much experience so any help would be appreciated

How do you specify the path to the file when it's in another directory?

Ehsan

i know it's a bit rude to join a group and immediately start asking for things, but i can't get over this problem .. I have to launch a file (for example chrome.exe) located in another directory. as long as the file is in the same directory there are no problems, I can use system ("chrome.exe"); I have tried in various ways, changing parameters and everything but I've never been able to launch any file . I also searched the internet but I don't have much experience so any help would be appreciated

just type the new directory in the system call

Cesco

How do you specify the path to the file when it's in another directory?

i tried in many ways, like system("cd C:\\Program Files (x86)\\Google\\Chrome\\Application"); (without double backslash i had a lot of warnings) system("chrome.exe"); or, system("C:\\Program Files (x86)\\Google\\Chrome\\Application\\chrome.exe");

Ehsan

just type the new directory in the system call

you can also make a bash script if you are more comfortable with it

Cesco

just type the new directory in the system call

already tried, i had errors about c is not a program ecc ecc

mov $22, %rax

i know it's a bit rude to join a group and immediately start asking for things, but i can't get over this problem .. I have to launch a file (for example chrome.exe) located in another directory. as long as the file is in the same directory there are no problems, I can use system ("chrome.exe"); I have tried in various ways, changing parameters and everything but I've never been able to launch any file . I also searched the internet but I don't have much experience so any help would be appreciated

use _execlp()

Cesco

sorry but i've been writing in c ++ for less than a year in high school and i don't know how bash etc etc are used, after i'll look thanks to all anyway

Ehsan

already tried, i had errors about c is not a program ecc ecc

it should work 🙂

Ehsan

i tried in many ways, like system("cd C:\\Program Files (x86)\\Google\\Chrome\\Application"); (without double backslash i had a lot of warnings) system("chrome.exe"); or, system("C:\\Program Files (x86)\\Google\\Chrome\\Application\\chrome.exe");

if you want to use cd you do this:

Ehsan

system("cd C:\\Program Files (x86)\\Google\\Chrome\\Application; ./chrome.exe”); (without double backslash i had a lot of warnings)

Cesco

it should work 🙂

"C:\Program" non è riconosciuto come comando interno o esterno, un programma eseguibile o un file batch. // translated "C: \ Program" is not recognized as an internal or external command, an executable program or batch file.

⚛ Hz

(PS: You can use / as path separator in windows (works for all win32 api, not working for NT api

Cesco

system("cd C:\\Program Files (x86)\\Google\\Chrome\\Application; ./chrome.exe”); (without double backslash i had a lot of warnings)

[Error] missing terminating " character

⚛ Hz

The problem is the space in the path, so you may need system("cd \"C:\\Program Files (x86)\\Google\\Chrome\\Application\"; ./chrome.exe");

Ehsan

[Error] missing terminating " character

I edited it

⚛ Hz

or if you're using c++ try system(R"command(cd "C:\Program Files (x86)\Google\Chrome\Application"; chrome.exe)command");

Cesco

The problem is the space in the path, so you may need system("cd \"C:\\Program Files (x86)\\Google\\Chrome\\Application\"; ./chrome.exe");

ok this on works but i can't find the path but it's my problem ig

⚛ Hz

ref: https://en.cppreference.com/w/cpp/language/string_literal

Cesco

ok no one worked. ig it's my pc problem, it has a lot of problem with windows :( thanks anyway

⚛ Hz

wait, removed ./ , it doesn't work with windows

⚛ Hz

btw, you should use another way to launch program

⚛ Hz

https://docs.microsoft.com/en-us/windows/win32/procthread/creating-processes <- the official way to create process

Pritam

I can't understand the file handling, please help me

Cesco

https://docs.microsoft.com/en-us/windows/win32/procthread/creating-processes <- the official way to create process

Thanks

Anonymous

I can't understand the file handling, please help me

What problem are you facing regarding this ?

Pritam

Totally

Anonymous

Totally

Focus on it completely! Start from scratch, you'll definitely learn to play with it.

Anonymous

Focus on it completely! Start from scratch, you'll definitely learn to play with it.

Check first, what are the requirements to use this concept in a program, after that point on I/O operations.

Pritam

What is the work of these operations's?

Anonymous

Suppose if I'll ask you to tell that which header file is used to start with File Handling ? What will be your answer ? If you've lil bit info about it.

Anonymous

What is the work of these operations's?

Just to read/write from/into any txt file and perform further actions.

Pritam

Ok

Anonymous

Ok

Yeah, Alright! ✌️ Not Panic! 😊 Just Chill! 🍁🖤

MAC

template <class T> T um(T &first, T &second) { T three; three.i = first.i * second.i; return three; }; ostream &operator<<(ostream &out, myclass &prm1) { out << prm1.i; return out; }; При вызове функции myclass a1,a2; cout << um(a1,a2); // error

MAC

why don't it works?

Pavel

template <class T> T um(T &first, T &second) { T three; three.i = first.i * second.i; return three; }; ostream &operator<<(ostream &out, myclass &prm1) { out << prm1.i; return out; }; При вызове функции myclass a1,a2; cout << um(a1,a2); // error

Can be a problem in myclass, does it give some meaningful errors?

Vlad

template <class T> T um(T &first, T &second) { T three; three.i = first.i * second.i; return three; }; ostream &operator<<(ostream &out, myclass &prm1) { out << prm1.i; return out; }; При вызове функции myclass a1,a2; cout << um(a1,a2); // error

1) eng only 2) it must have the member i

MAC

Can be a problem in myclass, does it give some meaningful errors?

<stdin>:42:7: error: invalid operands to binary expression ('std::__ndk1::ostream' (aka 'basic_ostream<char>') and 'myclass') cout << um(a1,a2); ~~~~ ^ ~~~~~ /data/user/0/ru.iiec.cxxdroid/files/bin/../lib/gcc/arm-linux-androideabi/4.9.x/../../../../include/c++/4.9.x/type_traits:4753:3: note: candidate function not

MAC

1) eng only 2) it must have the member i

It have a member i

Pavel

<stdin>:42:7: error: invalid operands to binary expression ('std::__ndk1::ostream' (aka 'basic_ostream<char>') and 'myclass') cout << um(a1,a2); ~~~~ ^ ~~~~~ /data/user/0/ru.iiec.cxxdroid/files/bin/../lib/gcc/arm-linux-androideabi/4.9.x/../../../../include/c++/4.9.x/type_traits:4753:3: note: candidate function not

seems like in ostream overload myclass (pm1) should be const ref

Pavel

because maybe it fails to pass temporary as mutable ref, not sure

Vlad

template <class T> T um(T &first, T &second) { T three; three.i = first.i * second.i; return three; }; ostream &operator<<(ostream &out, myclass &prm1) { out << prm1.i; return out; }; При вызове функции myclass a1,a2; cout << um(a1,a2); // error

Accept const ref into the operator<<

MAC