Programmers only

[Tony]

kin_energy = (1/2)*mass*speed*speed;

 

[jerome_the_sfs_boss]

kin_energy = (1/2)*mass*speed*speed;

oh ya

 

[jerome_the_sfs_boss]

for (i=0; i<numrows; i++)
  for (j=0; j<numcols; j++);
    pixels++;

try this

 

[jerome_the_sfs_boss]

#include <iostream>
using namespace std;

const char* append(const char* s1, const char* s2) {   
    string s(s1);   
    s += s2;
    return s.c_str();
}
void foo() {
    const char* total = append("abc", "def");
    cout<<"total = "<<total<<endl;
}

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

another one

 

[Altaïr]

kin_energy = (1/2)*mass*speed*speed;

No, sorry
And it's not about the lacking initialization either, though it's a good practice to always initialize a variable.

Here is the answer for those who give up.

Spoiler: Answer

The problem comes from "1/2". When a division concerns 2 integers, the compiler interprets it as an euclidian division. At least one of the numbers has to be declared as a float for it to be considered an actual division. 1 and 2 being 2 integers, the result of 1/2 is 0.

There are several solutions to fix this:

// Fixed in a very simple way
kin_energy = 0.5*mass*speed*speed;

// Write one of the numbers as a float (1 is an int, 1.0 is a float)
kin_energy = 1.0/2*mass*speed*speed;

//Or simply...
kin_energy = mass*speed*speed/2;
// The left term is a float, so it's fine.

 

[jerome_the_sfs_boss]

No, sorry
And it's not about the lacking initialization either, though it's a good practice to always initialize a variable.

Here is the answer for those who give up.

Spoiler: Answer

The problem comes from "1/2". When a division concerns 2 integers, the compiler interprets it as an euclidian division. At least one of the numbers has to be declared as a float for it to be considered an actual division. 1 and 2 being 2 integers, the result of 1/2 is 0.

There are several solutions to fix this:

// Fixed in a very simple way
kin_energy = 0.5*mass*speed*speed;

// Write one of the numbers as a float (1 is an int, 1.0 is a float)
kin_energy = 1.0/2*mass*speed*speed;

//Or simply...
kin_energy = mass*speed*speed/2;
// The left term is a float, so it's fine.

hmm interesting

 

[Tony]

No, sorry
And it's not about the lacking initialization either, though it's a good practice to always initialize a variable.

Here is the answer for those who give up.

Spoiler: Answer

The problem comes from "1/2". When a division concerns 2 integers, the compiler interprets it as an euclidian division. At least one of the numbers has to be declared as a float for it to be considered an actual division. 1 and 2 being 2 integers, the result of 1/2 is 0.

There are several solutions to fix this:

// Fixed in a very simple way
kin_energy = 0.5*mass*speed*speed;

// Write one of the numbers as a float (1 is an int, 1.0 is a float)
kin_energy = 1.0/2*mass*speed*speed;

//Or simply...
kin_energy = mass*speed*speed/2;
// The left term is a float, so it's fine.

 

[SFS for Life]

hmm imma gonna love this thread since i do programming

 

[Altaïr]

#include <iostream>
using namespace std;

const char* append(const char* s1, const char* s2) {  
    string s(s1);  
    s += s2;
    return s.c_str();
}
void foo() {
    const char* total = append("abc", "def");
    cout<<"total = "<<total<<endl;
}

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

another one

The const char* returned by the append function is actually a pointer on local data that will be destroyed when exiting the function. The data is no longer valid, this is likely to crash when you try to display the string.

 

[SFS for Life]

The const char* returned by the append function is actually a pointer on local data that will be destroyed when exiting the function. The data is no longer valid, this is likely to crash when you try to display the string.

hey nice

 

[jerome_the_sfs_boss]

The const char* returned by the append function is actually a pointer on local data that will be destroyed when exiting the function. The data is no longer valid, this is likely to crash when you try to display the string.

Correct

 

[Altaïr]

hmm imma gonna love this thread since i do programming

#include <string>
#include <iostream>

int main(void)
{
    std::cout << "Welcome to the forum SFS for Life!" << std:: endl;
    return 0;
}

 

[SFS for Life]

#include <string>
#include <iostream>

int main(void)
{
    std::cout << "THANK YOU!!!!" << std:: endl;
    return 0;
}

 

[jerome_the_sfs_boss]

lol nice

#include <string>
#include <iostream>

int main(void)
{
    std::cout << "THANK YOU!!!!" << std:: endl;
    return 0;
}

 

[Tony]

Altaïr
This is one of the mistakes to be avoided. Hard to beat. Well done. Very subtle.

 

[Tony]

Simple javascript test

<html>
<body>
<script Language = "JavaScript">

var n = "Test";
document.write ('welcome = ' + n);

</script>
</body>
</html>

 

[Tony]

there must be a solution. using javascript or html in attached file. No problem for the forum. You can trust me.

 

[Altaïr]

Simple javascript test

<html>
<body>
<script Language = "JavaScript">

var n = "Test";
document.write ('welcome = ' + n);

</script>
</body>
</html>

Does this write "welcome Test"?
I suppose there is a trap, but I don't know javascript.

 

[Soyuzturtle]

Me who's coding skills stretch to the ability to bp edit : reads this thread

Also me :

 

[jerome_the_sfs_boss]

Simple javascript test

<html>
<body>
<script Language = "JavaScript">

var n = "Test";
document.write ('welcome = ' + n);

</script>
</body>
</html>

<script Language = "JavaScript">
should just be
<script>

 

[SFS for Life]

<script Language = "JavaScript">
should just be
<script>

i think this is the mistake also

 

[jerome_the_sfs_boss]

i think this is the mistake also

 

[Tony]

Does this write "welcome Test"?
I suppose there is a trap, but I don't know javascript.

There is no trap and no code error. I just wanted to do a test. to execute the code you just have to copy the code in a .txt file and rename it in .html Then open the file with the web browser of your choice.

 

[jerome_the_sfs_boss]

Simple javascript test

<html>
<body>
<script Language = "JavaScript">

var n = "Test";
document.write ('welcome = ' + n);

</script>
</body>
</html>

it doesnt work

 

[jerome_the_sfs_boss]

made a website for no reason
http://pls-click-me.jp-ch.gq/