Why does the following compile in C++?
int phew = 53;
++++++++++phew ;
The same code fails in C, why?
Why does the following compile in C++? int phew = 53; ++++++++++phew ; The
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Why does the following compile in C++?
int phew = 53;
++++++++++phew ;
The same code fails in C, why?
That is because in
C++pre-increment operator returns anlvalueand it requires its operand to be anlvalue.++++++++++phew ;in interpreted as++(++(++(++(++phew))))However your code invokes
Undefined Behaviourbecause you are trying to modify the value ofphewmore than once between two sequence points.In
C, pre-increment operator returns anrvalueand requires its operand to be anlvalue. So your code doesn’t compile in C mode.