Expression Must Be A Modifiable Lvalue
He is a highly skilled fighter who can somersault through the air for thousands of miles, shrink himself or various objects and also freeze humans, demons and gods in their tracks. Enable Wukong to transform into a variety of creatures including tigers, rhinos, dragonflies, and humans – although his human disguises are always marred by his inability to hide his monkey tail. The Ruyi Cudgel is a gold-ringed iron pillar that can change size according to the whims of its master.It was originally embedded by Yu The Great in the floor of the Dragon King’s undersea palace to calm the seas. The monkey king sinopsis. The Monkey King’s Weapons and Armor:.
Expression must be a modifiable lvalue. An lvalue is value that is allowed to be on the Left hand side of an assignment statement. For example in the following statement, the variable Value is the lvalue as it is on the left hand side of the statement and is having its value modified to be 24. Expression must be a modifiable lvalue. But the left-hand side of this is an rvalue, namely the boolean resulting from the evaluation of the subexpression match 0 && k, so you cannot assign to it. By contrast, comparison has higher precedence, so match 0 && k m is equivalent to.
Non-modifiable Lvalue
Remember that a single = is always an assignment in C or C.Your test should be if ( match 0 && k M )you made a typo on the k M test.If you really mean k=M (i.e. A side-effecting assignment inside a test) you should for readability reasons code if (match 0 && (k=m)!= 0) but most coding rules advise not writing that.BTW, your mistake suggests to ask for all warnings (e.g.Wall option to g), and to upgrade to recent compilers. The next GCC 4.8 will give you:% g-trunk -Wall -c ederman.ccederman.cc: In function ‘void foo’:ederman.cc:9:30: error: lvalue required as left operand of assignmentif ( match 0 && k = M )^and Clang 3.1 also tells you ederman.cc:9:30: error: expression is not assignableSo use recent versions of free compilers and enable all the warnings when using them.
Code: scanf('%s', filename);fflush(stdin);fr = fopen(filename, 'rt');First line could lead to seg faults, as it's an unsafe way of reading a string. You know how fgets works, so why are you using scanf here?Second line is not valid in pure, standard C, but only allowed in some compilers by extension. It may or may not do what you think it will.The third line, while perhaps redundant with the 't' parameter, is never checked to see if the operation succeeded. You should probably be checking to see if fr is NULL.
C++ Expression Must Be A Modifiable Lvalue
An lvalue has an address that your program can access. Examples of lvalue expressions include variable names, including const variables, array elements, function calls that return an lvalue reference, bit-fields, unions, and class members. A prvalue expression has no address that is accessible by your program.