Lvalue and Rvalue - MYCPLUS - C and C++ Programming Resources

Lvalue and Rvalue

This topic has 4 replies, 2 voices, and was last updated 14 years, 7 months ago by LouanneT01.

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- April 12, 2010 at 4:22 pm #2246
 LouanneT01
 Participant
 plz anyone can tell me……how can we produce an error like lvalue and rvalue required.
 basically lvalue stands for left value and rvalue for right value.
 but i am unable to bring these errors in my programs….
- April 12, 2010 at 10:11 pm #3648
 GWILouisaxwzkla
 Participant
 An L-value violation is easy , just put a constant on the left hand side of an equation:
 const int myInt = 9; .. myInt = 3; // need an L-value here 
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 const int myInt = 9; 
 
 .. 
 myInt = 3; // need an L-value here 
 
 
 You need something that is assignable for a L-value. R-value violations are tougher , I’ll have to look into this…….
- April 13, 2010 at 7:10 pm #3649
 LouanneT01
 Participant
 hello sir,
 so u have changed ur name from cman to dman…..
 actually i know about LVALUE concept,but i m still alien about RVALUE.
 please find it somewhere and reply…..
 also i have posted a problem for “program without header files”…please reply on that too.
 thanks for replying.
 napster14
- April 13, 2010 at 7:52 pm #3650
 GWILouisaxwzkla
 Participant
 For an R-value violation you could do this:
 void func ( int i ); int main() { int i = func ( 3 ); } 
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 void func ( int i ); 
 
 int main() 
 { 
 int i = func ( 3 ); 
 
 } 
 
 
 pretty sure that would constitute a R-value violation…….
- April 14, 2010 at 7:34 am #3651
 LouanneT01
 Participant
 thank you for both the answers…..
 i’ll try them.
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