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I'm trying to see if string contains number. As I was searching on this site, i saw implementation by saying std::any_of(password.begin(), password.end(), ::isdigit) and it is supposed to return boolean value, true or false.
However, visual studio keeps saying thath namespace std has no memeber any_of.
std::any_of resides in the <algorithm> header which you need to include:
#include <algorithm>
Reference
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I'm currently reading a c++ book and one of the function is
void fp(char v[]){
for(char* p = v; *p!=0;p++) use(*p);
}
I wrote this into my editor and compiled it. I also included the headers
#include <iostream>
#include <string.h>
But my terminal returns the following message:
use of undeclared identifier 'use'
I also google it and its nowhere to be found online, the function doesn't exist.
That's because there is no such standard library function.
The author is either using pseudo-code here, or has defined this function somewhere else in the book.
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When I compiled following code:
#include<bits/stdc++.h>
using namespace std;
long int arr[100003],flag=0;
arr[0]=-1;
int main()
{
}
I got this error: 'arr' does not name a type arr[0]=-1
Please help me with this.
In standard C++ it is not possible assigning variable outside of function but you can initialized it.
You can't write code outside of functions. The only things you can have outside of functions are declarations such as global variable declarations (usually a bad idea), function declarations and Macros .
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Why is g++ giving an error like this?
blahblah.h:80:10: error: decomposition declaration not permitted in this context
float[NUM_OUTPUTS] output_buffer;
(Already solved, but creating this because there's no good google hits for this error text, and the error message is inscrutable.)
In C++ declarations, the array size goes after the variable name, not after the type:
float output_buffer[NUM_OUTPUTS];
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So, here I wanted to just define a vector and then print the size of the vector's present state, but the compiler in dev c/c++ gives me a compile-time error that "vector was not declared in the scope()"
I wonder if I haven't included the right header files,or something.
#include<iostream>
using namespace std;
int main()
{
vector<int> v(6); //defining the vector
cout<<"Size= "<<v.size(); //printing the present size of the vector
return 0;
}
Just include vector header.
#include <vector>
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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