wow it doesnt o.o

[Running ] Test: test_int [Running OK] Test: test_int [Running ] Test: test_int_flipped [Running OK] Test: test_int_flipped [Running ] Test: test_int_zero [Running OK] Test: test_int_zero [Running ] Test: test_long [Running OK] Test: test_long [Running ] Test: test_long_flipped [Running OK] Test: test_long_flipped [Running ] Test: test_long_zero [Running OK] Test: test_long_zero [Running ] Test: test_uint [Running OK] Test: test_uint [Running ] Test: test_uint_flipped [Running OK] Test: test_uint_flipped [Running ] Test: test_uint_zero [Running OK] Test: test_uint_zero [Running ] Test: test_ulong [Running OK] Test: test_ulong [Running ] Test: test_ulong_flipped [Running OK] Test: test_ulong_flipped [Running ] Test: test_ulong_zero [Running OK] Test: test_ulong_zero

FPU pipeline works almost concurrently

how is that relevant with FPU? there is no floating point here

would probs "overflow" if given zero

since x + 0 is x

i really suggest you to use builtin, it's fast the compiler only needs to check for OF (overflow flag) on x86 if you use the builtin https://godbolt.org/z/rMdxzz1vz

apart from that, it saves some hassle playing with complicated bit hacks

how is that relevant with FPU? there is no floating point here

It was about checking overflow through a double value

wait, subtraction and division can be implemented via addition and multiplication right?

welp (uint)1 + ~(uint)1 + (uint)1 doesnt work, but (int)1 + ~(int)1 + (int)1 does

https://electronics.stackexchange.com/a/98023

Hello guys, is it possible for a for loop to execute if one variable is undeclared? Btw, I'm still a new in c programming

wait, subtraction and division can be implemented via addition and multiplication right?

They could

Doesn't mean it's gonna be fast

Especially division

what would be a better way?

what would be a better way?

a / b 😂

integer division cant overflow

Just check for a zero

apparently it can

INT_MAX / -1

INT_MAX / -1

Isn't it INT_MIN-1?

yea

INT_MIN / -1

INT_MIN / -1

Yeah that's gonna blow

But that's like 2 cases total

-2147483648

a / b 😂

It's probably could be made faster if you convert it to float

Although some accuracy will suffer

welp, lets ignore division for now

how do i detect a subtraction overflow

how do i detect a subtraction overflow

substraction is basically addition of uint's if you have a two complement integer

And you do basically everywhere

how would you detect it

if a is negative and b is negative but the result is positive

how would i detect that using bit shifting

oh i thought you wanted to do this in C, are you doing it in hardware?

hmmm

https://rextester.com/YWUQ96880

which one of these SHOULD overflow? signed 1073741823 + 1073741823 = 2147483646 (overflowed: false) signed 1073741824 + 1073741823 = 2147483647 (overflowed: false) signed 1 + 2147483647 = -2147483648 (overflowed: true) signed 1 + 1 = 2 (overflowed: false) signed 1 + -1 = 0 (overflowed: false) signed -1 + -1 = -2 (overflowed: false) signed -1 + 1 = 0 (overflowed: false) signed 1 + 2 = 3 (overflowed: false) signed 1 + -2 = -1 (overflowed: false) signed -1 + -2 = -3 (overflowed: false) signed -1 + 2 = 1 (overflowed: false) signed 2 + 1 = 3 (overflowed: false) signed 2 + -1 = 1 (overflowed: false) signed -2 + -1 = -3 (overflowed: false) signed -2 + 1 = -1 (overflowed: false)

I write volatile bool* b;. Is b a pointer to volatile boolean variable or it is a volatile pointer to boolean variable?

I write volatile bool* b;. Is b a pointer to volatile boolean variable or it is a volatile pointer to boolean variable?

pointer to volatile bool https://cdecl.org/

I write volatile bool* b;. Is b a pointer to volatile boolean variable or it is a volatile pointer to boolean variable?

volatile pointer would be bool * volatile b;

Thanks

hi guys, i cant understand where my mistake is. can you fix it?

C code to find the sum of the principal diagonal of a 10x10 matrix consisting of random numbers from 1 to 10

#include <stdio.h> #include<conio.h> #include<time.h> int main () { srand(time(NULL)); int n, i, j, sum; sum =0; int mat[i][j]; for(i=1;i<=n;i++) { for(j=1;j<=n;j++) { n=rand()%100; printf("%d. satir ,%d.sutun elemani : ",i,j); mat[i][j]=n; }} for(i=0;i<=10;i++) { sum= sum+n; printf("Sum : %d",mat[i][j]); } getch(); }

#include <stdio.h> #include<conio.h> #include<time.h> int main () { srand(time(NULL)); int n, i, j, sum; sum =0; int mat[i][j]; for(i=1;i<=n;i++) { for(j=1;j<=n;j++) { n=rand()%100; printf("%d. satir ,%d.sutun elemani : ",i,j); mat[i][j]=n; }} for(i=0;i<=10;i++) { sum= sum+n; printf("Sum : %d",mat[i][j]); } getch(); }

C can't use variables for matrix definition

I tried printing out the values for i and J and this is the size of the matrix you made: This is i 16 This is j 467

so it's a 16x467 matrix

I tried printing out the values for i and J and this is the size of the matrix you made: This is i 16 This is j 467

Garbage values

#include <stdio.h> #include<conio.h> #include<time.h> int main () { srand(time(NULL)); int n, i, j, sum; sum =0; int mat[10][10]; for(i=1;i<=n;i++) { for(j=1;j<=n;j++) { n=rand()%100; printf("%d. satir ,%d.sutun elemani : ",i,j); mat[i][j]=n; }} for(i=0;i<=10;i++) { sum= sum+n; printf("Sum : %d",mat[i][j]); } getch(); }

#include <stdio.h> #include<conio.h> #include<time.h> int main () { srand(time(NULL)); int n, i, j, sum; sum =0; int mat[i][j]; for(i=1;i<=n;i++) { for(j=1;j<=n;j++) { n=rand()%100; printf("%d. satir ,%d.sutun elemani : ",i,j); mat[i][j]=n; }} for(i=0;i<=10;i++) { sum= sum+n; printf("Sum : %d",mat[i][j]); } getch(); }

Try this, It doesn't fix your code but you're one step closer

Try this, It doesn't fix your code but you're one step closer

can you send the fixed form please 🥹

Hello everyone. What if I going to make an application that should be written many different languages? Is there any alternative environments or applications to do this?

Hello everyone. What if I going to make an application that should be written many different languages? Is there any alternative environments or applications to do this?

There's Haxe that can be cross-compiled into multiple languages Also libraries with C interface can be used with many languages, but this can be a lot of headache

There's Haxe that can be cross-compiled into multiple languages Also libraries with C interface can be used with many languages, but this can be a lot of headache

Thanks

How can I read binary format of directory structure in c++? Is there any way?

I trying to make application like winrar to make a single file which contains a directory

I trying to make application like winrar to make a single file which contains a directory

the first six bytes let it be the number of directories and the next ones let it be for where does the first directory start and then the number of files then 6 bytes points to where your file starts

It would be like this [number of folders][pointer to folder 1 ][2][3]... then each folder may have more folders implemented like how I showed you earlier then if there were files in the folder remember pointer that pointed to folder 1 this will point to a table of the content of the each file then files will be written one after the other

It would be like this [number of folders][pointer to folder 1 ][2][3]... then each folder may have more folders implemented like how I showed you earlier then if there were files in the folder remember pointer that pointed to folder 1 this will point to a table of the content of the each file then files will be written one after the other

Thank you so much, I understood the most of the part but How can I unzip this?

Thank you so much, I understood the most of the part but How can I unzip this?

you have a table for the first directory then a table points to each subdirectory inside it with their names then a table for each file in the first directory with each file name

Thank you so much, I understood the most of the part but How can I unzip this?

so you just follow each block pointing to a block that holds the length of pointing blocks inside another table which will be followed by the pointing blocks following the structure that I explain earlier

Quick question: How doI add two vectors into athird using std::transform? For example: v1{1,2,3}, v2{3,2,1} and after std::transform v3={4,4,4}.

Guys because in the books to avoid are those of Deitel

Can I share a project here for feedback?

https://github.com/MichaelDim02/lykan

transform(v1.begin(), v1.end(), v2.begin(), back_inserter(v3), [](auto i, auto j){i+j;});

ax^2 + bx + c = 0

this the mathmatical formula

C Program to Find the Roots of a Quadratic Equation https://www.programiz.com/c-programming/examples/quadratic-roots

you just need to apply the formula that is tought in high school and you will get an answer right away

hey . sorry I ask for a good and simple frame work for c++

solve_equ( double a , double b , double c ) { return ( -b * pow( pow( b , 2 ) - 4 * a * c , 0.5) ) / 2 * a }

solve_equ( double a , double b , double c ) { return ( -b * pow( pow( b , 2 ) - 4 * a * c , 0.5) ) / 2 * a }

this how you do it

hey . sorry I ask for a good and simple frame work for c++

a framework for what kind of programs?

a framework for what kind of programs?

mobile application and games

solve_equ( double a , double b , double c ) { return ( -b * pow( pow( b , 2 ) - 4 * a * c , 0.5) ) / 2 * a }

he still need the complex one

mobile application and games

Qt framework is quit good because it’s cross platform