Statement with no effect -wunused-value gcc
The statement ed.operator [j] == str [i]; isn't an assignment; it's a comparison using ==. To make this an assignment, try writing ed.operator [j] = str [i]; The warning that you're getting means that the comparison produces a value that's never used, so the statement doesn't have any visible effect on the program. WebAug 31, 2015 · -Wunused-value, -Wno-unused-value¶ Warn whenever a statement computes a result that is explicitly not used. To suppress this warning cast the unused expression to …
Statement with no effect -wunused-value gcc
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WebApr 16, 2024 · :18:14: warning: statement with no effect [-Wunused-value] x == y; and there are multiple MISRA-C rules regarding side effects, fundamentally saying there should be one, and only one, side effect in any expression. Other expressions considered being a side effect are: modifying a file read a volatile object WebNov 3, 2008 · When I compile this in GCC with the -Wall option (required in my class) I get: Warning: statement with no effect. This is on the lines where newX and newY are …
WebJul 8, 2015 · As David says, there are unused values in the comma-separated list. Normally, you would put in here either assignments or function calls, like: (p = & foo, myFunc (20), q = NULL, m++). The main purpose of this syntax is to construct more complicated initialisers and incrementors in "for" loops. WebMar 12, 2024 · To suppress this warning use the “unused” attribute. Doing so would look like the following: void bar (__attribute__ ( (unused)) int a) { } This has two drawbacks: It is a verbose syntax. It is...
WebBugzilla Link 45394 Version trunk OS All Blocks #4440 CC @AaronBallman,@dwblaikie,@DougGregor,@zygoloid,@stephenhines Extended Description attribute((warn_unused ... WebFirst, let's check the result obtained by calc_sum_squares_upto (n), because it looks too small. It is very easy to check this number manually by entering the closed-form expression in some other calculator. For n = 100, you should get 338350, not 100. Therefore, we want to focus our attention on calc_sum_squares_upto (n) initially.
Webfeatures; GCC does not support warning about features that go beyond a particular library's limitations. However, if -pedanticis used with -Wformat, warnings will be given about format features not in the selected standard version (but not for strfmonformats, Refer to Section 4.4 Options Controlling C Dialect.
Webpublic inbox for [email protected] help / color / mirror / Atom feed * [RFA] -Wunused -> -Wunused{,-{function,label,parameter,variable,value}}] @ 2000-03-20 21:48 Andrew Cagney 2000-03-21 7:04 ` Gavin Romig-Koch 0 siblings, 1 reply; 12+ messages in thread From: Andrew Cagney @ 2000-03-20 21:48 UTC ( permalink / raw ) To: GCC Patches; +Cc: body p anchorWeb-Wunknown-warning), GCC emits a diagnostic stating that the option is not recognized. However, if the -Wno-form is used, the behavior is slightly different: no diagnostic is … body pain womenWebNov 27, 2016 · ascii.c:7:2: warning: statement with no effect [-Wunused-value] for (i=32,j=2;i++;i<256) 原因是：for格式用错：修改为： for (i=32,j=2;i<256;i++)后就ok 修改后 … glen gery mortar color chartWebJan 16, 2024 · In GCC, you can label the parameter with the unused attribute. This attribute, attached to a variable, means that the variable is meant to be possibly unused. GCC will not produce a warning for this variable. In practice this is accomplished by putting __attribute__ ( (unused)) just before the parameter. For example: glen gery red smooth brickWebJul 28, 2011 · it does not create statements with no effect and the arguments are not evaluated at all (if you call non-inline functions in the argument list, in your version the … body paiting photoraphyWebMay 5, 2024 · The following sketch is supposed to read the value of a debounced button and light one or two corresponding LEDs. The sketch won't work, I've serial.print()ed it a while … glen gery stone grey klaycoatWebAbove prints "Inside". j = 1 is the last expression evaluated inside the if statement which has true value. Yogesh R.L 579 score:3 You have three comma operators in each of the three terms of the for statement. The warning is for term 2. Both expressions of terms 1 and 3 are executed as expected. glen gery showroom