what are the differences between pass-by-value and pass-by-reference in C++
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Hi all, can you tell me what are the differences between pass-by-value and pass-by-reference in C++? thankyou
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Hi all, can you tell me what are the differences between pass-by-value and pass-by-reference in C++? thankyou
Didn't Google help you with this problem?:confused: [the differences between pass-by-value and pass-by-reference in C++ - Google Search](https://www.google.com/search?q=the+differences+between+pass-by-value+and+pass-by-reference+in+C%2B%2B&sourceid=chrome&ie=UTF-8)
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Didn't Google help you with this problem?:confused: [the differences between pass-by-value and pass-by-reference in C++ - Google Search](https://www.google.com/search?q=the+differences+between+pass-by-value+and+pass-by-reference+in+C%2B%2B&sourceid=chrome&ie=UTF-8)
Pass-by-value is when someone presents an answer to your problem. Pass-by-reference is when someone tells you "Why don't you just f***g google it?" For being slightly more helpful: Pass-by-value is when the caller makes a copy of the argument and hands this copy over to you. It carries no information about where your copy of the value is taken from - it may very well be the value of an expression directly stated in the argument list of the actual call. The copy is yours, and whatever you do to it won't affect anyone else. The value (copy) exists only as long as your method is running. Pass-by-reference is when the caller doesn't give you a copy of the value, but rather tells you where you can find it, i.e. the location (address) in memory where the value is stored. You have to go and look there to find the value. In most cases, other parts of the program will be looking in the same location, and if your method changes the value stored, others who subsequently look there, will see your modifications to the value. The location exists both before and after the call to your method. There is nothing C++ specific to this; it goes for all languages (or rather: all languages providing both call-by-value and call-by-reference - which are most of them).
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Pass-by-value is when someone presents an answer to your problem. Pass-by-reference is when someone tells you "Why don't you just f***g google it?" For being slightly more helpful: Pass-by-value is when the caller makes a copy of the argument and hands this copy over to you. It carries no information about where your copy of the value is taken from - it may very well be the value of an expression directly stated in the argument list of the actual call. The copy is yours, and whatever you do to it won't affect anyone else. The value (copy) exists only as long as your method is running. Pass-by-reference is when the caller doesn't give you a copy of the value, but rather tells you where you can find it, i.e. the location (address) in memory where the value is stored. You have to go and look there to find the value. In most cases, other parts of the program will be looking in the same location, and if your method changes the value stored, others who subsequently look there, will see your modifications to the value. The location exists both before and after the call to your method. There is nothing C++ specific to this; it goes for all languages (or rather: all languages providing both call-by-value and call-by-reference - which are most of them).
Victor gave "value" AND a "reference". Should he read it out loud or copy and paste it?
"Before entering on an understanding, I have meditated for a long time, and have foreseen what might happen. It is not genius which reveals to me suddenly, secretly, what I have to say or to do in a circumstance unexpected by other people; it is reflection, it is meditation." - Napoleon I
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Pass-by-value is when someone presents an answer to your problem. Pass-by-reference is when someone tells you "Why don't you just f***g google it?" For being slightly more helpful: Pass-by-value is when the caller makes a copy of the argument and hands this copy over to you. It carries no information about where your copy of the value is taken from - it may very well be the value of an expression directly stated in the argument list of the actual call. The copy is yours, and whatever you do to it won't affect anyone else. The value (copy) exists only as long as your method is running. Pass-by-reference is when the caller doesn't give you a copy of the value, but rather tells you where you can find it, i.e. the location (address) in memory where the value is stored. You have to go and look there to find the value. In most cases, other parts of the program will be looking in the same location, and if your method changes the value stored, others who subsequently look there, will see your modifications to the value. The location exists both before and after the call to your method. There is nothing C++ specific to this; it goes for all languages (or rather: all languages providing both call-by-value and call-by-reference - which are most of them).
Thanks for breaking down the concepts of pass-by-value and pass-by-reference in such an engaging way! Your explanation makes it clear how these methods work and their implications in programming. It's great to see how this applies across various languages, not just C++. For those interested in enhancing their programming skills, it's essential to grasp these differences.