expression result unused|error equality comparison with extraneous parentheses : iloilo Learn how to fix the error "expression result unused" in a for-loop when using the variable height as the control variable. See two answers with different solutions and explanations. See all 76 photos Write a review. Add photo. Share. Save. Menu. Popular dishes. View full menu. $17.50. Blackened Mahi Mahi Sandwich. 4 Photos 2 Reviews. $17.50. The Beach Cowboy. 4 Photos 2 Reviews. $16.50. .
expression result unused,The expression (@"%@",myString) evaluates to myString (via the "comma operator") and thus the result of the first expression (@"%@") is discarded/unused. –Learn how to fix the error "expression result unused" in a for-loop when using the variable height as the control variable. See two answers with different solutions and explanations.Expression result unused 标识符的结果没有被使用. 情况:在for的循环中使用了 *pl++; 原因:自增优先级扰乱了编程顺序,首先执行了pl++,表示地址自增,就错了. 修正: (*pl)++; 或 .
Reports the expressions that are calculated, but the calculation result is not used anywhere. Such errors can be caused, for example, by misspelling the = operator .
Since you declared i outside the loop, the expression i in the first part of the for is unused: for ( i /* <<== This one */ ; i < tags.count; i ++) { } The syntax of the for .
Hi, When compiling Cython 0.19.2 code with Clang, I'm getting the following warning: clang -Wno-unused-result -fno-common -dynamic -DNDEBUG -g -fwrapv .I'm trying to write a simple program to find prime factors of a number, and keep running into an "expression result unused" compiler error on the final argument of a couple for .expression result unusedwarning: expression result unused [-Wunused-value] dut_mmult_accel_core (in_stream, out_stream, .
expression result unused error equality comparison with extraneous parenthesesYour "month" variable is not being used in any way which is why is complains "Expression result unused". If you'd have written printf("%s", month) then here "month" is actually .
In a for loop, the first item is the initialization. You are saying. for (height; height>0; height--) and the compiler is expecting that first item to be an initialization but you have simply given it a variable. Why does the compiler issue the warning: Expression results unused in the last else statement of this code? PowerballLottery::WinningPossibility PowerballLottery::checkTicket(PowerballTicket ticke.error equality comparison with extraneous parentheses如何解决expression result unused. "expression result unused" 是一种警告信息，表示代码中的某个表达式的结果未被使用，这可能会导致程序的不稳定性或错误。. 要解决这个问题，可以通过以下方法：. 检查代码中是否有未使用的变量或函数返回值，如果有，可以尝试删 . 介绍 在编程过程中，有的函数我们需要确保函数的返回值必须被使用。但是如果函数使用者直接调用函数且不使用函数的返回值的话，g++ 不会给出warning。这样可能会导致很难寻觅的bug。如调用realloc函数，函数调用者必须使用函数的返回值获得重新分配 .
NSURLConnection* connection = [NSURLConnection alloc]; [connection initWithRequest:request delegate:self]; In the last line I get "Expression Result Unused" warning. Now, according to all the articles online I have read, this is the correct way to call a method, and the syntax is as advised to download a URL async.
2. It's because of the parenthesis. By writing (blabla) it becomes an expression, which you are not using as an expressing, hence the compiler complains. Change to [NSString stringWithFormat: .]; and it becomes a method.
1. An expression like (centv-25) produces a value. But because you don't assign that value to a variable, it's unused. The compiler might delete that code if it has not side effects. – Jens. Jul 21, 2015 at 20:24.
warning: expression result unused [-Wunused-value] 所以，虽然 有些编译器可能允许函数调用出现在表达式语句中 ，但这种用法通常是不推荐的，因为它容易引起误解，增加代码的复杂性，同时也可能导致编译器警告或错误。最好的做法是确保函数调用的返回值要么被赋值 . 以下代码将for循环的 j / 10 部分 expression result unused 的 expression result unused 扔回去，我不确定为什么。. j should be set to the ith variable in the array and as long as j is still above 1 , should divide by 10 and execute the following code. j 应该设置为数组中的ith变量，并且只要 j 仍大于 1 ，应 . Then we would have: candidates[i].votes++; return true; return false; That fixes the “expression result unused” message, but then another problem arises. This is not the code you want. This code causes the routine to return false as soon as it sees a candidate in the array that does not match the name parameter.
5. You dereference the pointer too, not only incrementing it. That dereference will give you the value pointed to by the old pointer (before the increment) but you don't use that value, leading to the warning. Simple solution? Don't use the dereference operator *. In other words, *p++ parses as *(p++).
When I compile a statement [[NSArray alloc] init];, clang gives “warning: expression result unused [-Wunused-value]”.. How do I cause “Expression result unused” warnings from my own function? For example: @interface SimplePromise : NSObject -(SimplePromise*)then:(id(^)(id result))block; @end -(void)someMethod { // I .
关于c - 警告 : expression result unused，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/19261171/
smartwatch.cpp:69:31: warning: expression result unused [-Wunused-value] second->getScreen_size() * percentage; I am new at this, so i don't know what i am doing wrong. c++; . The compiler is warning you because the line of code second->getScreen_size() * percentage; doesn't store a result or change a value. The result of the multiplication . 相关问题 clang：折叠表达式和“未使用表达式结果”警告 - clang: Fold expression and “expression result unused” warning 警告：返回带有两个参数构造函数的对象时，表达式结果未使用 - Warning: expression result unused when returning an object with a two argument constructor GoogleTest“表达式结果未使用” - GoogleTest .
The p->pushString(s) part is an expression, it's the context (with the terminating semi-colon) that turns it into a statement. That also means you can do something like. 5; Or in your case. "some string here"; Those are valid statements. They do however produce a result, which is (legally) discarded or ignored, but might cause the .
You get the warning about expression result unused because in your case you don't use "is even". . brackets there are 2 expressions. You can omit brackets and use else after if only if there is one expression after if. Try adding {} around the code after if and you will get only warnings about expression result unused. Share. Expression result unused; Relational comparison result unused; 前者のメッセージは sd <= 9 に対してのもの、 後者のメッセージは td <= 9 に対してのものです。 まず、これらのメッセージは、コンパイルエラーではなくて、警告（Warning）です。
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