Accessing a string element

Accessing a string element

The standard string class offers two ways to access a single character from a string object. The first one is to use the overloaded subscript operator [ ] like in the following example:

 #include  using namespace std;void main(){  string s = "hello world";  char c = s[0];  //assign  'h' to c}

Another way is to use the at() member function:

 try{  string s = "hello world";  char c =;  //assign  'h' to c; safer than [ ] but less efficient. }catch(bad_range& str_ex) { //when accessing an out of range element, at() throws a bad_range exception/*..*/ }

There are two differences between these access methods. The [ ] operator is efficient but unsafe since it does not perform range checking. Accessing an out of range member is possible and results in an undefined behavior. The at() member function, on the other hand, is less efficient but safer, since it performs range checks. In case of an attempt to access an out of range member, it throws an exception of type std::bad_range. Please note that exactly the same access rules apply to vector<> as well.

Share the Post:
Heading photo, Metadata.

What is Metadata?

What is metadata? Well, It’s an odd concept to wrap your head around. Metadata is essentially the secondary layer of data that tracks details about the “regular” data. The regular

XDR solutions

The Benefits of Using XDR Solutions

Cybercriminals constantly adapt their strategies, developing newer, more powerful, and intelligent ways to attack your network. Since security professionals must innovate as well, more conventional endpoint detection solutions have evolved

AI is revolutionizing fraud detection

How AI is Revolutionizing Fraud Detection

Artificial intelligence – commonly known as AI – means a form of technology with multiple uses. As a result, it has become extremely valuable to a number of businesses across

AI innovation

Companies Leading AI Innovation in 2023

Artificial intelligence (AI) has been transforming industries and revolutionizing business operations. AI’s potential to enhance efficiency and productivity has become crucial to many businesses. As we move into 2023, several

data fivetran pricing

Fivetran Pricing Explained

One of the biggest trends of the 21st century is the massive surge in analytics. Analytics is the process of utilizing data to drive future decision-making. With so much of

kubernetes logging

Kubernetes Logging: What You Need to Know

Kubernetes from Google is one of the most popular open-source and free container management solutions made to make managing and deploying applications easier. It has a solid architecture that makes

ransomware cyber attack

Why Is Ransomware Such a Major Threat?

One of the most significant cyber threats faced by modern organizations is a ransomware attack. Ransomware attacks have grown in both sophistication and frequency over the past few years, forcing