Zebra0.com

 Vectors

Vectors

Learn C++ in step-by-step lessons.

Vectors

An array has a fixed number of elements, all of the same type. When you declare an array such as int numb[5]; the compiler calculates the amount of memory required: 5 *sizeof(int), and exactly that amount of space is allocated.

A vector does not have a fixed size and can grow larger or smaller as needed. Items are added to the end, as the last element, using the push_back method.

Both arrays and vectors can be traversed using a for loop:

Goals:

• Be able to understand and use vectors

Objectives:

• Explain the difference between arrays and vectors
• Use a vector instead of an array
• Search a vector
• Read afile into a vector
• Sort a vector

Please study the material at each of the links below.

1. Comparison of array and vector
2. Search and erase from a vector
3. Read from a file into a vector
4. Read a file and bubble sort

Glossary for vectors lesson