I am trying to calculate the Greatest Common Denominator of two integers.
C Code:
#include <stdio.h> int gcd(int x, int y); int main() { int m,n,temp; printf("Enter two integers: \n"); scanf("%d%d",&m,&n); printf("GCD of %d & %d is = %d",m,n,gcd(m,n)); return 0; } int gcd(int x, int y) { int i,j,temp1,temp2; for(i =1; i <= (x<y ? x:y); i++) { temp1 = x%i; temp2 = y%i; if(temp1 ==0 and temp2 == 0) j = i; } return j; }
In the if statement, note the logical operator. It is and
not &&
(by mistake). The code works without any warning or error.
Is there an and
operator in C? I am using orwellDev-C++ 5.4.2 (in c99 mode).
Use double quotation marks (“”) around a direct quote. A direct quote is a word- for-word report of what someone else said or wrote. You use the exact words and punctuation of the original. Harriet Jacobs writes, “She sat down, quivering in every limb” (61).
Quotation marks are most often used to mark something that is spoken or, in other words, to designate a direct quote. That is, they display something that's been said, word for word.
Double quotation marks are used for direct quotations and titles of compositions such as books, plays, movies, songs, lectures and TV shows. They also can be used to indicate irony and introduce an unfamiliar term or nickname. Single quotation marks are used for a quote within a quote.
General Usage Rules In America, Canada, Australia and New Zealand, the general rule is that double quotes are used to denote direct speech. Single quotes are used to enclose a quote within a quote, a quote within a headline, or a title within a quote.
&&
and and
are alternate tokens and are functionally same, from section 2.6 Alternative tokens from the C++ draft standard:
Alternative Primary and &&
Is one of the entries in the Table 2 - Alternative tokens and it says in subsection 2:
In all respects of the language, each alternative token behaves the same, respectively, as its primary token, except for its spelling. The set of alternative tokens is defined in Table 2.
As Potatoswatter points out, using and
will most likely confuse most people, so it is probably better to stick with &&
.
Important to note that in Visual Studio
is not complaint in C++ and apparently does not plan to be.
Edit
I am adding a C specific answer since this was originally an answer to a C++ question but was merged I am adding the relevant quote from the C99 draft standard which is section 7.9 Alternative spellings <iso646.h>
paragraph 1 says:
The header defines the following eleven macros (on the left) that expand to the corresponding tokens (on the right):
and includes this line as well as several others:
and &&
We can also find a good reference here.
Update
Looking at your latest code update, I am not sure that you are really compiling in C mode, the release notes for OrwellDev 5.4.2 say it is using GCC 4.7.2. I can not get this to build in either gcc-4.7
nor gcc-4.8
using -x c
to put into C language mode, see the live code here. Although if you comment the gcc
line and use g++
it builds ok. It also builds ok under gcc
if you uncomment #include <iso646.h>
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