C++ Function

C++ FUNCTION cpplab.pbworks.com

C++ Function ,[object Object],[object Object],cpplab.pbworks.com

Why We need Function ? ,[object Object],[object Object],[object Object],[object Object],cpplab.pbworks.com

Example ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],cout<<"result = "<<result; cout<<" try another x ="; cin>>x; result= x*x+2*x-x/3+23; cout<<"result 2 = "<<result; cout<<" try another x ="; cin>>x; result= x*x+2*x-x/3+23; cout<<"result 3 = "<<result; return 0; } cpplab.pbworks.com

[object Object],cpplab.pbworks.com

Example ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],cout<<"result = "<<result(x); cout<<" try another x ="; cin>>x; cout<<"result 2 = "<<result(x); cout<<" try another x ="; cin>>x; cout<<"result 3 = "<<result(x); return 0; } int result(int y) { return ( y*y+2*y-y/3+23); } cpplab.pbworks.com

Here We Go ,[object Object],[object Object],cpplab.pbworks.com

What is a Function ? ,[object Object],[object Object],[object Object],[object Object],[object Object],cpplab.pbworks.com

Example #include <iostream.h> int result (int y); int main () { int x; cout<<" Welcome here "; cout<<" Please Insert value of x to find the answer of this equation : result=x*x+2*x-x/3+23 x="; cin>>x; cout<<"result = "<<result(x); cout<<" try another x ="; cin>>x; cout<<"result 2 = "<<result(x); cout<<" try another x ="; cin>>x; cout<<"result 3 = "<<result(x); return 0; } int result(int y) { return ( y*y+2*y-y/3+23); } Function prototype Function call Function Definition cpplab.pbworks.com

Function Prototype ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],cpplab.pbworks.com

Function Definition ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],cpplab.pbworks.com

Function Call ,[object Object],[object Object],[object Object],[object Object],[object Object],cpplab.pbworks.com

Example ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Function prototype Function prototype Function prototype Function call Function definition cpplab.pbworks.com

Remmber .. ,[object Object],[object Object],[object Object],[object Object],[object Object],cpplab.pbworks.com

Return value ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],double here means function will return one value with type double Because the function return double value , so we Have to call this function inside cout staement or assign it to any variable with same type e.g. double m=circle (reduis); cpplab.pbworks.com We use ”return ” because the function return value with type double

Parameter ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Double r here means function will pass one parameter form place of calling with type double Because the function return double value , so we Have to call this function inside cout staement or assign it to any variable with same type e.g. double m=circle (reduis); cpplab.pbworks.com We use ”return ” because the function return value with type double

[object Object],[object Object],[object Object],[object Object],[object Object],cpplab.pbworks.com

C++ Function

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