Problem Solving with C++ (9th Edition)
9th Edition
ISBN: 9780133591743
Author: Walter Savitch
Publisher: PEARSON
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Chapter 17.1, Problem 6STE
Program Plan Intro
Function template:
In C++, a function template is referred as a “generic” function, which can work with different data types.
- While writing a function template, a programmer should use a “type parameter” to denote a “generic” data type instead of using the actual parameter.
- The compiler generates the code, when it encounters a function call to a function template. This code will handle the particular data type which is used in the function call.
- The compiler identifies the argument type and generates the code to work with those types.
- The generated code is referred as “template function”.
Example:
For example consider the following function template for finding a cube of value:
template <class T>
T cube(T x)
{
return x * x * x ;
}
- A function template must begin with the keyword “template” and it is followed by a pair of angle brackets, which contains one or more “generic” data types.
- A “generic” type must start with the keyword “class”, followed by an argument name which stands for the data type.
- The statement “T cube(T x)” is referred as function header, where “T” is a “type parameter”, “cube” is the function name and the variable “x” is declared for the type “T”.
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Chapter 17 Solutions
Problem Solving with C++ (9th Edition)
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