In practice, the vector series in c ++ -- Some vector exceptions

In practice, the vector series in c ++ -- Some vector exceptions

Today, we will write some vector exceptions that can be captured.

Out_of_range
The array is out of bounds. The vector automatically increases the capacity, but if the index exceeds the current size, an exception is thrown.

# Include
  
   
# Include
   
    
Using namespace std; int main () {vector
    
     
V (4); std: cout <v [0] <std: endl; std: cout <v [1] <std: endl; std: cout <v [2] <std: endl; std: cout <v [3] <std: endl; std :: cout <v [4] <std: endl; // return 0 out of bounds ;}
    
   
  

In addition to using indexes, the following error occurs when vector. at () is used:

#include 
  
          // std::cerr#include 
   
          // std::out_of_range#include 
    
              // std::vectorint main (void) {  std::vector
     
       myvector(10);  try {    myvector.at(20)=100;      // vector::at throws an out-of-range  }  catch (const std::out_of_range& oor) {    std::cerr << "Out of Range error: " << oor.what() << '\n';  }  return 0;}
     
    
   
  

Std: length_error
When vector is used, std: length_error is rarely thrown. However, if you neglect to write such code:

#include 
  
          // std::cerr#include 
   
          // std::length_error#include 
    
              // std::vectorint main (void) {  try {    // vector throws a length_error if resized above max_size    std::vector
     
       myvector;    myvector.resize(myvector.max_size()+1);  }  catch (const std::length_error& le) {      std::cerr << "Length error: " << le.what() << '\n';  }  return 0;}
     
    
   
  

Vector * pData;