Referring to the O'Reilly pocket reference for C, I'm a little confused by the description for grouping of the *, /, and % operators. The book says that grouping occurs left to right -- now I think I'm getting grouping confused with evaluation order. Given the following equation, and the rules established from the book, I would have thou...
What am I doing wrong here? I am wanting to display integers from 1-100 who are divisible by either 6 or 7. That's done and working. The next step is to not display any that are divisible by both...that isn't working in my loop (those integers are still displaying) for (int i = 1; i < 100; i++) if (i % 6 == 0 || i % 7 == 0 && i %...
Hello! On http://sial.org/howto/perl/one-liner/ I found the following two one-liners. The outputs are different because the unless statement is different from if ! ( due to the associativity and precedence rules ). cat file: foo bar perl -ne 'print unless /^$/../^$/' file foo bar perl -ne 'print if ! /^$/../^$/' fi...
#include<stdio.h> #include<conio.h> #define ABC 20 #define XYZ 10 #define XXX ABC - XYZ void main() { int a; a = XXX * 10; printf("\n %d \n", a); getch(); } I thought the output should be 100 but when i saw the result i found o/p as -80. when i put bracket as #define XXX (ABC-XYZ) then i get output as 100 but wi...
Given std::vector<CMyClass> objects; CMyClass list[MAX_OBJECT_COUNT]; Is it wise to do this? for(unsigned int i = 0; i < objects.size(); list[i] = objects.at(i++)); Or should I expand my loop to this? for(unsigned int i = 0; i < objects.size(); i++) { list[i] = objects.at(i); } ...
Hi, there: Here I have a question. What is the priority of the operator * in assembly language? For example: *0x804983c(,%eax,4) Does it mean ( %eax * 4 ) + *0x804983c or *( %eax * 4 + 0x804983c )? Thanks! ...
In our project, we have implemented the Specification Pattern with boolean operators (see DDD p 274), like so: public abstract class Rule { public Rule and(Rule rule) { return new AndRule(this, rule); } public Rule or(Rule rule) { return new OrRule(this, rule); } public Rule not() { return...
Hello, I am just wondering would it be better to do this: if((fd = open(filename, O_RDWR)) == -1) { fprintf(stderr, "open [ %s ]\n", strerror(errno)); return 1; } or this fd = open(filename, O_RDWR); if(fd == -1) { fprintf(stderr, "open [ %s ]\n", strerror(errno)); return 1; } Many thanks for any suggestions, ...
I have the following code that I'm reading through: if( (i%2) == 0 ){ *d = ((b & 0x0F) << 4); } else{ *d++ |= (b & 0x0F); }; I'm looking specifically at the else statement and wondering in what order this occurs? I don't have a regular C compiler, so I can't test this. When we are performing *d++ |= (b & 0x0F);, what orde...
I like scala's propose of operator precedence but in some rare case unmodified rules may be inconvenient because you have restrictions in naming your methods. Is there in scala ways to define another rules for a class/file/etc? If not would it be resolved in future? ...
var clicked = $(event.currentTarget || target); var clickedIsActive = clicked[0] == this.active[0]; I'm fairly new to js, and while attempting to read through some jQuery code, I came across the above section. What is the precedence for the second line? Is it: var clickedIsActive = (clicked[0] == this.active[0]); Or is it someth...
Somebody write this function void strToUpper(char *p) { while (*p) { *p = TOUPPER(*p); *p++; //<-- Line to pay attention } } I asked, why do you put the * before p++? answer: because "It's the same", I corrected the code and then stay angry for a while, because both really work the same... void strToUpper...
Possible Duplicates: Could anyone explain these undefined behaviors (i = i++ + ++i , i = i++, etc) How do we explain the result of the expression (++x)+(++x)+(++x)? Why does the following program print 10? Isn't it supposed to print 12? int j=2; j = j++ * ++j; printf("%d", j); ...
After writing my response on the question how to assign to multiple variables in a ternary operator I actually tried out the code I wrote: true ? $w = 100 xor $r = 200 : $w = 300 xor $r = 400; var_dump($w); var_dump($r); (Don't bother it's useless, this is theoretic.) Now, I would expect PHP to do it this way, according to operator p...
Is (int)(int1 / (float)var2.Count() * 100) equivalent to (int)((int1 / (float)var2.Count()) * 100) ...and will it use floating point or integer division? Edit... if the answer is yes to the above, what is the advantage of performing a floating point division here? ...
This is probably an easy math question but what is the reason for the order of PEMDAS. I mean, why isnt' it SADMEP? Parenthesis, Exponents, Multiplication, Division, Addition, Subtraction Below was added because it does require knowledge of PEMDAS albeit a very basic concept it's one that I thought was more interesting in terms of why...
Hey guys, I'm reading the "Beginning Perl" book, and it gives these two statements: print "Test one: ", 6 > 3 && 3 > 4, "\n"; print "Test two: ", 6 > 3 and 3 > 4, "\n"; The first line prints nothing with a new line, the second line prints a 1 with no new line. I'm confused about the output. According to the author, the second stateme...
I'm stuck with a weird VS2008 C++ issue, that looks like operator precedence is not respected. My question is what is the output of this: int i = 0; std::cout << ((i != 0) ? "Not zero " : "zero ") << ++i << std::endl; Normally the ++ has precedence over the <<, right? Or is the << considered like a function call giving it a hi...
Hiii all I made this program today int main() { int a = 1,2; /* Shows error */ int b = (1,2); /* No error */ } Why first one shows error while second one does not? Just ( ) makes one program compile. Why? --Shruti ...
The operator precedence table I can find is: https://developer.mozilla.org/en/JavaScript/Reference/Operators/Operator_Precedence according to the table, both '>>' and '*' are left-to-right associate, and '>>' have higher precedence, so I think a >> b * c should explain as (a >> b) * c however, my test in Firefox (using Firebug), tell m...