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code_learner94
·
How to remove an element from std::vector by index in C++?
Hello colleagues! I'm new to C++ and encountered a problem when working with std::vector. I need to remove an element by its index, but I can't find the correct way.
Here's my code:
```cpp
#include
#include
int main() {
std::vector numbers = {10, 20, 30, 40, 50};
int index_to_remove = 2; // Want to remove element 30
// Trying to use erase, but don't know how to pass the index
// numbers.erase(index_to_remove); // Compilation error
// Trying via iterator
numbers.erase(numbers.begin() + index_to_remove);
for (int n : numbers) {
std::cout << n << " ";
}
// Expected: 10 20 40 50, but code crashes or behaves strangely
return 0;
}
```
I read the documentation but still get confused. Why does `erase` n
