C Programming - Functions - Discussion
Discussion Forum : Functions - Find Output of Program (Q.No. 1)
1.
What will be the output of the program in 16 bit platform (Turbo C under DOS)?
#include<stdio.h>
int main()
{
int fun();
int i;
i = fun();
printf("%d\n", i);
return 0;
}
int fun()
{
_AX = 1990;
}
Answer: Option
Explanation:
Turbo C (Windows): The return value of the function is taken from the Accumulator _AX=1990.
But it may not work as expected in GCC compiler (Linux).
Discussion:
43 comments Page 2 of 5.
Manish kulkarni said:
8 years ago
As there is no return statement then how it will return value to calling the function?
Swapnil said:
9 years ago
First, declare the _AX as integer variable in fun function then, return the _AX from fun Function in order to get the same output. But _AX is an accumulator which we can not access directly in GCC compiler. Why so? Please explain.
Ashok said:
9 years ago
How can prototype declaration of fun() done in main function?
SyntaxError said:
9 years ago
In the above given program, there is no return type in called fn. Then how it return the value to calling function?
And why this c compiler showing an error?
And why this c compiler showing an error?
Ahmedhalim said:
9 years ago
This code will print garbage value because it isn't has return.
Sanju said:
9 years ago
First of all, in the function definition, there is no return statement. So error1===no return statement.
_AX is not declared. So error2=='_AX' undeclared (first use in this function).
How will it give output?
Can anyone help me?
_AX is not declared. So error2=='_AX' undeclared (first use in this function).
How will it give output?
Can anyone help me?
Raju said:
9 years ago
'_AX' is undeclared so it should not give any output.
Thamizharasi said:
10 years ago
Actually it shows an error because the function is defined outside the main function. To show an output the function will be declared before main function.
Neeraj said:
10 years ago
How can a function be called in main without mentioning its prototype before the main()?
Richik said:
1 decade ago
In function 'fun':
Line 13: error: '_AX' undeclared (first use in this function).
Line 13: error: Each undeclared identifier is reported only once.
Line 13: error: For each function it appears in.
Encountering these errors, on copying the given code. How did you guys get the answer as 1990?
Line 13: error: '_AX' undeclared (first use in this function).
Line 13: error: Each undeclared identifier is reported only once.
Line 13: error: For each function it appears in.
Encountering these errors, on copying the given code. How did you guys get the answer as 1990?
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