@ammarfaizi2
Ah, I see, you are a man of culture as well.
Sorry for being off topic
User404
V01D
I have a low level question (perhaps @lightness_races_in_orbit or @SysMario could help)
I know that I have to disable interrupts when moving into 32 bit mode using the cli instruction.
But I am looking through some IDT/ISR code of this kernel (https://www.github.com/nexos-dev/NexOS/tree/development/NexKe%2FHal%2Fx64) and I cannot see him enabling interrupts!
Is this done automatically or what am I missing here?
.
Anonymous
HELLO.....CAN ANYONE TELL ME THAT WHICH WHICH PROGRAMME SHOULD I DO AS A BEGINNER "C"....i have already done (HELLO WORLD,ADDITION,SUBTACTION,MULTIPLICATION, AND AREA OF CIRCLE"...I HAVE ALREADY DONE ABOVE MENTIONED PROGRAMMES...NOW WHAT SHOULD I GO FOR?
Pavel
HELLO.....CAN ANYONE TELL ME THAT WHICH WHICH PROGRAMME SHOULD I DO AS A BEGINNER "C"....i have already done (HELLO WORLD,ADDITION,SUBTACTION,MULTIPLICATION, AND AREA OF CIRCLE"...I HAVE ALREADY DONE ABOVE MENTIONED PROGRAMMES...NOW WHAT SHOULD I GO FOR?
1. Turn off your caps
2. After variables, input-output and arithmetics, you need to write something with conditionals, then loops, then arrays, ...
I googled a list of excersises for you
https://www.w3resource.com/c-programming-exercises/
Anonymous
THANK YOU SO MUCH @pavel
Matin Rzaev
int main()
{
char* str = _strdup("5267");
int result = 0;
for (int i = 0; *(str+i) !='\0'; i++)
{
result = result * 10 + *(str+i);
}
cout << result << endl;
cin.get();
return 0;
}
Matin Rzaev
Matin Rzaev
Hi guys.Could you help me please?
I want to convert string to int without using any specials functions.But the output is not correct.Because compiler doesn't add value of str[i],it adds value in ascii table.
Matin Rzaev
How i can fix that
...
thats because while accessing a char, you get a char, the char doesnt magically convert to an int
Pavel
Hi guys.Could you help me please?
I want to convert string to int without using any specials functions.But the output is not correct.Because compiler doesn't add value of str[i],it adds value in ascii table.
It is how it works. What you can do is substract 48 from the ascii code (code of zero). But that's not a portable solution, you can use it to show off to your friends but don't use that in real code
Matin Rzaev
Matin Rzaev
thats because while accessing a char, you get a char, the char doesnt magically convert to an int
I use string instead of char?
...
try doing result = result * 10 + ((*(str + i )) - '0')
Matin Rzaev
It works correctly.Thanks so much guys 👍👍
...
please, dont use this in any sort of system that needs to be reliable..
Matin Rzaev
Pavel
What is "code of zero"?
Every symbol has a char representation (can be 1 char in some encodings, can be 2+ in others). Numbers inside strings are no exception
Pavel
So I just provided ascii code of zero, the solution of @ff_0x1d3 with '0' is better though
Matin Rzaev
S s
Anyone want Html coding for website
Anonymous
V01D
Anonymous
HTML ... Wha.... Dear lord
Pooja
Thank you😁
Pooja
Anyone please let me how I can learn HTML5 and css3 to develop a web page
MᏫᎻᎯᎷᎷᎬᎠ
Anyone please let me how I can learn HTML5 and css3 to develop a web page
This is not a html/css group
Pooja
What?
MᏫᎻᎯᎷᎷᎬᎠ
Any non related topic will be reported
carnivorous plant
they have finally found each other
carnivorous plant
what a great relationship
Evgeny
Guys, can someone help?
I have 2 variables
char * var1 = "var2";
int var2 = 10;
How can I print the contents of var2 (10) through var1?
Ammar
Guys, can someone help?
I have 2 variables
char * var1 = "var2";
int var2 = 10;
How can I print the contents of var2 (10) through var1?
You can't, variables in C are not annotated after compile time is over. You have to make your own identifier and call each variable based on a such identifier.
For example:
int main() {
/* define var1, var2, var3, var4, and so on here... */
int x = 1;
switch (x) {
case 1: /* do something with var1 */ break;
case 2: /* do something with var2 */ break;
/* and so on... */
}
}
Ammar
But wait, I think it may be possible for global variables, since there is a corresponding symbol for each of them.
Evgeny
You can't, variables in C are not annotated after compile time is over. You have to make your own identifier and call each variable based on a such identifier.
For example:
int main() {
/* define var1, var2, var3, var4, and so on here... */
int x = 1;
switch (x) {
case 1: /* do something with var1 */ break;
case 2: /* do something with var2 */ break;
/* and so on... */
}
}
Do you mean something like this?
Char * var1 = "var2";
Int var2 = 10;
Switch(var1){
Case "var2":
Printf("%d", var2);
}
Ammar
Do you mean something like this?
Char * var1 = "var2";
Int var2 = 10;
Switch(var1){
Case "var2":
Printf("%d", var2);
}
No, you can't do that with C/C++ switch case. It only accepts integer for the case.
Ammar
Guys, can someone help?
I have 2 variables
char * var1 = "var2";
int var2 = 10;
How can I print the contents of var2 (10) through var1?
I think this is relevant https://linuxgazette.net/85/misc/sandeep/Ptrace.c.txt
Ammar
PTRACE should be able to read the variable's value based on its symbol. Like debugger does.
Ammar
I have not tried it and I do not really know the technical detail, but it is clearly possible, since gdb can do that.
Ammar
You can't, variables in C are not annotated after compile time is over. You have to make your own identifier and call each variable based on a such identifier.
For example:
int main() {
/* define var1, var2, var3, var4, and so on here... */
int x = 1;
switch (x) {
case 1: /* do something with var1 */ break;
case 2: /* do something with var2 */ break;
/* and so on... */
}
}
I retract this, local variables may also be annotated with symbols if you compile your source with -g flag. But it needs the source file to exist.
Evgeny
I retract this, local variables may also be annotated with symbols if you compile your source with -g flag. But it needs the source file to exist.
It would seem an easy task, but I've been puzzling over it for half a day ...
Evgeny
I think this is relevant https://linuxgazette.net/85/misc/sandeep/Ptrace.c.txt
It all looks like a very advanced solution, probably it will be easier for me to get around this method with a variable inside a variable and come up with something else.
Evgeny
I have not tried it and I do not really know the technical detail, but it is clearly possible, since gdb can do that.
Thanks a lot for your help! 🤝
Anonymous
#Ask
Sorry, sis, permission to ask, here is someone who uses the C language text editor Sublime, Thank you.
Ammar
Evgeny
Can you please explain with an example?
Harsh
Guys, can someone help?
I have 2 variables
char * var1 = "var2";
int var2 = 10;
How can I print the contents of var2 (10) through var1?
Maybe this can help?
int var2 = 10;
int * var1 = &var2;
std::cout << *var1 << std::endl;
Evgeny
Maybe this can help?
int var2 = 10;
int * var1 = &var2;
std::cout << *var1 << std::endl;
@Johnn_D0e
This doesn't solve my problem, but thanks anyway 💪🏼
I already figured out how to work around this and got stuck with a new problem ... love C 🤎
Anonymous
Can I ask a question related to math?
Asdew
If it's also a C/C++ question.
Asdew
If not, #ot.
Wojak
You will also find it as one of the best book on Stackoverflow community poll for C++.
5th edition is updated and re-written in 2012 for STL and C++11.
But this actually is a good book for beginers and intermediate programmers.
That's my own research, use google wisely for better reviews
Wojak
Dima
Wojak
😂😂
Roxifλsz 🇱🇹
Valentine
Mar!o
𝒜𝒷𝒹𝓊𝓁𝑀𝒶𝑒𝒷𝑜𝓊𝒹
Talula
Pooja
How can i print minimum no. Of word from sentence using array in C.