Is there a way to add all the elements of a vector to an integer sequentially?

puckettrobinson675

So...the vector has 1, 2, and 3 The integer is 10 The result should be 11, 12, and 13 As a side note, is there a way to add a repeating number to an integer to infinity? Example...the integer is 10 and I want to add 4 to it. Then 4 again. And again. And again in a loop

Victor Nijegorodov

puckettrobinson675 wrote:

is there a way to add a repeating number to an integer to infinity? Example...the integer is 10 and I want to add 4 to it. Then 4 again. And again. And again in a loop

Yes, just add 4 in the loop. however, not infinitely but until your integer exceeds the possible nax value for its type. See [C and C++ Integer Limits | Microsoft Learn](https://learn.microsoft.com/en-us/cpp/c-language/cpp-integer-limits?view=msvc-170)

Lost User

Something like:

int number = 10;
std::vector vec = { 1, 2, 3 };
for (int value : vec)
{
    std::cout << number + value << std::endl;
}

In the second case you need to add a check that the sum does not overflow beyond the maximum range of the integer.

CPallini

Quote:

Is there a way to add all the elements of a vector to an integer sequentially?

Yes, there are, at least, three different ways:

#include #include #include using namespace std;

void dump (vector v)
{
for (auto x :v )
cout << x << " ";
cout << "\n";
}

int main()
{

{ // method 1: access items by indices
vector v{1,2,3};

int c = 4;

for (size\_t n = 0; n v{1,2,3};

int c = 4;

for (auto & x : v)
{
  x += c;
}

cout << "method 2: ";
dump(v);

}

{ // method 3: use 'transform' of the algorithm library
vector v{1,2,3};

int c = 4;

transform(v.begin(), v.end(), v.begin(), \[=\](int  x){ return x+c; });

cout << "method 3: ";
dump(v);

}
}

Quote:

As a side note, is there a way to add a repeating number to an integer to infinity?

Yes, but this way the addition will overflow. Try:

#include using namespace std;

int main()
{
int i = 1;
int last_i;
int c = 4;
for (;;)
{
last_i = i;
i += c;
if ( i < last_i)
break;
}

cout << "unfortunately, (" << last_i << "+" << c << ") makes " << i;
}

"In testa che avete, Signor di Ceprano?" -- Rigoletto