Read from file negative numbers C++ [closed] - c++

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I have to get numbers from file and some of them are negative. So, how can I do that? (C++)
Now I'm trying just this (without something special):
U1.txt file:
4 5 -1 6 -2
My code:
ifstream fd(FD);
int n1,n2,n3,n4,n5;
fd>>n1>>n2>>n3>>n4>>n5;

Your code is basically correct, except for that typo with n4 missing.
This:
ifstream fd("U1.txt");
int n1,n2,n3,n4,n5;
fd>>n1>>n2>>n3>>n4>>n5;
Will do what you expect, modulo error conditions.

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How to change comma to period when typing double number in TextField?

why does [[:xdigit:]] highlight letter e in grep results? [closed]

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Closed 2 years ago.
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Why does below command highlight e as well with digits?
grep '[[:xdigit:]]' search.txt
This is intended, as it searches for hexadecimal digits.
The man-page states:

capture numbers between two characters in R [closed]

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Closed 6 years ago.
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I need to capture cpu usage data from this string, in this cast cpu usage is 1.55. Values between - and %
cpu<-c("CPU Usage: u814.13 s13.33 cu0 cs0 - 1.55% CPU load")
I have tried this:
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([\d\.]+)% CPU.*$
You didn't include the decimal dot in the square brackets

do_trucate in jinja2, correct usage needed [closed]

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Closed 7 years ago.
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I think I saw something on using this to truncate test as a filter, but I've seen to no idea how to use it. Using as xx|do_trucate(20) gives the following:
TemplateAssertionError: no filter named 'do_truncate'
What is the correct usage?
Doh, from the spec I saw
do_trucate
http://code.nabla.net/doc/jinja2/api/jinja2/jinja2.filters.html
But in reality, its just truncate

a Sequential that decreased by 5 using a for loop [closed]

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Closed 8 years ago.
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i want to print a Sequential that decreased by 5
using a for loop
but i don't know why it doesn't print the output :(
#include<bits/stdc++.h>
using namespace std;
int main(){
for(int j=60;j<=0;j-=5){
cout<<j<<endl;
}
}
whats the wrong?!
Change it to
for(int j=60;j>=0;j-=5){
^^