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cplusplus:pointers_2

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cplusplus:pointers_2 [2019/03/11 19:53]
mithat [Pointer to constant data]
cplusplus:pointers_2 [2019/03/28 16:55] (current)
mithat
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 ===== Calling functions by reference ===== ===== Calling functions by reference =====
  
-Pointers can be used to implement //call-by-reference// in functions. The ''​*''​ operator is used to alias a variable inside of function.  ​+Pointers can be used to implement //passing ​by reference// in functions. The ''​*''​ operator is used to alias a variable inside of function.  ​
  
 <code cpp> <code cpp>
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 </​code>​ </​code>​
  
-In the function above, ''​*number''​ is used as an alias for the variable passed in. Strictly speaking, the passing mechanism is //call-by-value// because the argument that is passed into the function (an address) is copied to the formal pointer parameter ''​number''​. However, dereferencing ''​number''​ acts as an alias to whatever is passed in.+In the function above, ''​*number''​ is used as an alias for the variable passed in. Strictly speaking, the passing mechanism is //pass by value// because the argument that is passed into the function (an address) is copied to the formal pointer parameter ''​number''​. However, dereferencing ''​number''​ acts as an alias to whatever is passed in.
  
  
 <file cpp cube-by-reference.cpp>​ <file cpp cube-by-reference.cpp>​
-/** Cube a variable using call-by-reference with a pointer. */+/** Cube a variable using pass by reference with a pointer. */
 #include <​iostream>​ #include <​iostream>​
 using namespace std; using namespace std;
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 <WRAP center tip 90%> <WRAP center tip 90%>
-I feel pointers are much better than reference parameters for implementing ​call by reference because the syntax in the function invocation (e.g., ''​cubeByReference(&​number))''​ makes it clear that a pointer is involved --- which is good indication that call by reference is being used.+I feel pointers are much better than reference parameters for implementing ​pass by  reference because the syntax in the function invocation (e.g., ''​cubeByReference(&​number))''​ makes it clear that a pointer is involved --- which is good indication that pass by  reference is being used.
 </​WRAP>​ </​WRAP>​
  
cplusplus/pointers_2.1552334008.txt.gz · Last modified: 2019/03/11 19:53 by mithat