与 c++ 中指定的数组大小相比，当我尝试再添加一个值时会发生什么？

Question

#include <iostream>
using namespace std;

int main()
{
    int marks[4]={40,10,25,56};
    marks[5]=99;
    
}

What will happen if i tried to add 5th element in array of size 4?

Answer 1

Not really an answer, but this shows how to use std::array instead of a raw array:

#include <iostream>
#include <array>

using namespace std;

int main()
{
//  int marks[4] = { 40,10,25,56 };
  std::array<int, 4> marks = { 40,10,25,56 };

  marks[5] = 99;
}

Depending on your platform and tools, debug builds show an error message when you access such an array out of bounds.