Chopping Off the last Number for a Double [closed] - c++

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Closed 10 years ago.
If I have a double: 732734
How can I return 73273 <---- notice the loss of the '4'

Divide by 10 and then floor it to remove the decimals:
number = floor(number / 10.0)

I found this somewhere. It removes the last digits after decimal. Not the actual solution but this might give you some hint:
int main(){
for (int a=0;a<80;a++)
printf(".");
printf("%2.0f\n",1024.48);
printf("%2.0f\n",4.48);
for (int a=0;a<80;a++)
printf(".");
return 0;
}
Output:
................................................................................
1024
4
................................................................................

Related

Change '_' to ' ' doesn't work at all [closed]

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Closed 9 years ago.
So i got simple code to change all _ to space but...it doesnt work! Any1 knows why? I have no idea
while (fout >> array[x][y]){
if (array[x][y]=='_') array[x][y]==' ';
y++;
if (y==8) {
y=0;
x+=1;
}
}
Take a look at this line:
if (array[x][y]=='_') array[x][y]==' ';
^
You have two equal signs when you are attempting to set the new value.

Coffeescript if/else issue [closed]

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Closed 9 years ago.
How can i write this line of code in Coffeescript? Thank's
window.scrollY >= origOffsetY ? navbar.classList.add('navbar-fixed-top') :
navbar.classList.remove('navbar-fixed-top');
I try this, but doesn't work.
if window.scrollY >= origOffsetY then navbar.classList.add('navbar-fixed-top') else navbar.classList.remove('navbar-fixed-top')
Your coffeescript compiles to :
if (window.scrollY >= origOffsetY) {
navbar.classList.add('navbar-fixed-top');
} else {
navbar.classList.remove('navbar-fixed-top');
}
This seems pretty OK for me.

Regex matching phone numbers [closed]

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Closed 10 years ago.
Can someone help me out here? I need a regex that will match the following pattern:
10-(any 5 digits except 73480)-(any 4 digits)
Examples
valid: 10-12345-1234
invalid: 10-73480-1234
Thanks
You should use negative lookahead to check for any occurance of 10-73480 before matching..
^(?!10-73480)10-\d{5}-\d{4}$
Try it here

meaning of this regular expression /(\+\d{2})/ [closed]

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Closed 10 years ago.
Can anyone tell me meaning or possible values of below regular expression?
/(\+\d{2})/
Plus followed by a number on 2 digits.
This matches for instance: +23
A + followed by 2 digits: +23 +01 etc.

Odd strncpy usage [closed]

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Closed 10 years ago.
I've seen a pretty strange (for me) usage of this method:
strncpy(somePointer,"%d",someInt);
What does this actually do? The integer specifier "%d" as the source is troublesome for me to understand.
It does what it says on the tin: It copies the literal string "%d" into a char buffer pointed to by somePointer, or at least the first someInt bytes of it (up to three).
Don't be upset by a percentage sign, it's just another character...