C Programming - Expressions - Discussion

#include<stdio.h>
int main()
{
int a=35;
printf("%d %d %d ",a==40,a<=50,a=30);
return 0;
}

Please explain it clearly ....

o/p : 0 0 30

Hi Friends...
The evalution order in c is:Right to left but in c++ is Left to Right.
During the display, the values are dispaly from left to right.(both c and c++)

#include<stdio.h>
int main()
{
int a=35;
printf("%d %d %d ",a==40,a<=50,a=30);
return 0;
}


O/P : 0 1 30


For eg::
main()
{
int i=5;
printf("%d %d",++i,++i);
}

O/P:: in c::7,6 but in c++ 6,7
But it varies depends on the compiler..

Where are the difference between GCC compiler and Turbo C compiler ?

Can anybody explain this...?

@Shefali : Difference between GCC and Turbo C compiler is that they are made by different companies.

But the standard for C language is same.

Then you must be asking why their is so much difference in output in two compilers.

So always consider GCC as prime because it is industrial standard C compiler. And Turbo C is old compiler which is not used anymore now except educational purpose to simplify complexity.

The o/p of above explained program is not 0030
Its 0130
Execution in that s 4m right to left
STEP1: FIRST the variable IS assigned as 35 at the time of declaration
STEP2: Then in the printf statement variable a is assigned as a=30(as execution is from right to left)
step 3: Then a<=50 becomes 30<=50 &the value of that relational expression is 1(30<=50 is true)
step 4: Then a==40 becomes 30==40&its value is zero
The execution is from right to left but the values are printed as per the seqence. So ans is 0130.

OUTPUT ? AND WHY THAT O/P?

#include<stdio.h>
int main()
{
int i=2;
int j=3;
printf("%d, %d\n", ++j, ++i);
return 0;
}

Output will be 3 and 4 as in printf() function expression is evaluated from right to left. and displayed from left to right. As here ++i will be evaluated first then i becomes 3 and than ++j will be evaluated than j becomes 4.

But as output is left to right.

Hence output is 4 3 (gcc compiler).

Could you please tell me the exact difference as to why 4 4 is printed in c compiler whereas 4 3 in gcc?

.

What is the difference between ++i and i++. Can anybody explain with an example?