\n C++ Programming Course<\/a>\n <\/p>\n Master key C++ programming concepts like variables, functions, OOP, and control structures. Build real-world projects such as a banking system and grade management tool.<\/p>\n An inline function in C++ is an optimisation feature that reduces the execution time of a program, just as we have macros<\/strong> in C. This concept of inline functions is used while handling Classes in C++. It is used otherwise as well, though. Whenever such a function is encountered, the compiler replaces it with a copy of that function\u2019s code (function definition). In other words, one may say that such a function is expanded in-line, hence named as an inline function<\/strong>.<\/p>\n\n\n\n Inline functions are commonly used when the function definitions are small, and the functions are called several times in a program. Using inline functions saves time to transfer the control of the program from the calling function to the definition of the called function. <\/p>\n\n\n\n However, inlining a function is just a request or suggestion to the compiler, not any mandatory command. It depends on the compiler whether to accept or decline this suggestion of inlining a particular function. The compiler is most likely to not consider the inlining of a function under certain circumstances that are mentioned here as follows-<\/p>\n\n\n\n The syntax for defining an inline function has been shown below:<\/p>\n\n\n\n In order to make a function inline in C++, the keyword \u201cinline<\/strong>\u201d is used. Here is an example of C++ code explaining the implementation of an inline function:<\/p>\n\n\n Here, the inline function add(int a, int b) has been defined before the main() function and later been called inside the main () function. When the add function is called, the code of the add function definition is placed there, i.e. inlined at the time of compilation. Henceforth, it saves from the overhead of function calls and returns. The working of the inline function add(a,b) has been illustrated below: <\/p>\n\n\n\n If one has to declare the inline function in a Class in C++ explicitly, then declaring the function inside the class and defining it outside the class using the inline keyword is the only requirement. However, an inline function can be defined inside a class as well. Following is an example of C++ code to help you get a better view of implementing an inline function while dealing with classes.<\/p>\n\n\n At the time of compilation, this inline function max(a,b) in the above example works in the same way as the inline function add(a,b) in the previous example.<\/p>\n\n\n\n The Inline function is quite a useful feature provided by C++ due to its several advantages that are listed below.<\/p>\n\n\n\n Any reliable feature you name in a programming language comes with its own set of cons, and so is with the inline functions of C++. Let\u2019s see the disadvantages of inline functions now!<\/p>\n\n\n\n As an overview of the whole topic of inline functions in C++, here are a few essential points necessary to be remembered about the inline functions while using C++ language.<\/p>\n\n\n\n This brings us to the end of the blog on Inline Functions in C++. Hope this helps you to up-skill your C++ skills. To learn more about programming and other related concepts, check out the courses on Great Learning Academy<\/a>. <\/p>\n\n\n\nInline Function in C++<\/strong><\/h2>\n\n\n\n
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inline return-type function-name(parameters){ \/\/ function code} <\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n Example of an Inline Function<\/strong><\/h4>\n\n\n\n
\n#include<iostream>\nusing namespace std;\ninline int add(int a, int b) \/\/Inline function definition\n{\nreturn a+b;\n}\n\nint main()\n{\ncout<<"The addition of 562 and 451 gives the value:"<<add(562,451)<<"n"; \/\/Inline function call\nreturn 0;\n} \n\/\/Output: The addition of 562 and 451 gives the value:1013\n\n\n<\/pre><\/div>\n\n\n#include <iostream> <\/strong>
using namespace std; <\/strong>
inline int add(int a, int b) <\/strong>
{ <\/strong>
return a+b<\/strong>:
} <\/strong>
int main() <\/strong>
{ <\/strong>
cout << \"The addition of 562 and 451 gives the value: \"<< add(562,451) << \"n\"; <\/strong>
return 0; <\/strong>
} <\/strong><\/td>
COMPILATION<\/strong><\/td>
##include <iostream> <\/strong>
using namespace std; <\/strong>
inline int add(int a, int b) <\/strong>
{ <\/strong>
return a+b; <\/strong>
} <\/strong>
int main() <\/strong>
{ <\/strong>
cout << \"The addition of 562 and 451 gives the value: \" << 562+451 << \"n\"; <\/strong>
return 0; <\/strong>
} <\/strong>
<\/strong><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n\ninline int A::add(int a, int b)\/\/Inline function definition\n{\nreturn (a>b)?a:b;\n} \n\n\nclass A\n{\n public:\n inline int max(int a, int b)\/\/Inline function declaration with definition\n {\n return (a>b)?a:b;\n };\n}\n\nclass A\n{\n public:\n int max(int a, int b);\/\/Inline function declaration\n}\n<\/pre><\/div>\n\n\nAdvantages of using Inline Functions<\/strong><\/h2>\n\n\n\n
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Disadvantages of Inline Functions<\/strong><\/h2>\n\n\n\n
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Points to be kept in mind<\/strong><\/h3>\n\n\n\n
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