C Programming - Functions - Discussion

Discussion Forum : Functions - Find Output of Program (Q.No. 15)
15.
What will be the output of the program?
#include<stdio.h>

int addmult(int ii, int jj)
{
    int kk, ll;
    kk = ii + jj;
    ll = ii * jj;
    return (kk, ll);
}

int main()
{
    int i=3, j=4, k, l;
    k = addmult(i, j);
    l = addmult(i, j);
    printf("%d, %d\n", k, l);
    return 0;
}
12, 12
7, 7
7, 12
12, 7
Answer: Option
Explanation:

Step 1: int i=3, j=4, k, l; The variables i, j, k, l are declared as an integer type and variable i, j are initialized to 3, 4 respectively.

The function addmult(i, j); accept 2 integer parameters.

Step 2: k = addmult(i, j); becomes k = addmult(3, 4)

In the function addmult(). The variable kk, ll are declared as an integer type int kk, ll;

kk = ii + jj; becomes kk = 3 + 4 Now the kk value is '7'.

ll = ii * jj; becomes ll = 3 * 4 Now the ll value is '12'.

return (kk, ll); It returns the value of variable ll only.

The value 12 is stored in variable 'k'.

Step 3: l = addmult(i, j); becomes l = addmult(3, 4)

kk = ii + jj; becomes kk = 3 + 4 Now the kk value is '7'.

ll = ii * jj; becomes ll = 3 * 4 Now the ll value is '12'.

return (kk, ll); It returns the value of variable ll only.

The value 12 is stored in variable 'l'.

Step 4: printf("%d, %d\n", k, l); It prints the value of k and l

Hence the output is "12, 12".

Discussion:
33 comments Page 2 of 4.

Krushang said:   8 years ago
@Sidharth

In return function. it takes only right most value.

So when k = addmult(i, j); is called value goes to the addmult(i,j) then kk=3+4=7 & ll=3*4=12.

Ten value return to the return(kk,ll) then it takes the only right most value so k=12 and then l=12.

Haldipur said:   8 years ago
Good explanation, thanks @Potnuru.

Bhavana said:   6 years ago
The given explanation is correct, as there is no declaration of character variable kk so it does not print it takes only integer values.

Faizan said:   6 years ago
In this comma operator is used, it work from left to right (kk, ll) but they were in bracket so right most value will be print and if there would be no bracket then left most value get printed.

Velantina said:   6 years ago
When we call the function it will take the latest value of k.

Harini reddy said:   5 years ago
Thank you @Potnuru.

Sia jill said:   4 years ago
If I want an output 7,12, then how to proceed? Please tell me.

Sana said:   2 decades ago
We didnt got why only l value is taken. Why 12 12 why not 7 12 ?

Sachin said:   1 decade ago
Basically, the return statement is from right to left calling pattern because a function can't return double value at a time without using pointer. So the compiler would always take the right value as a result.

$tRiKeR said:   1 decade ago
@Potnuru.

#include<stdio.h>

int main()
{
printf("India", "BIX\n");
return 0;
}

Then what is the output of this program if your comma operator has left to right then BIX will be output but by indiabix it is Indis then who is correct ?


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