int I=12; int &r=I; here r is a reference to I r+=r/4; =>r=r+r/

int f() {
int I = 12;
int &r = I;
r += r / 4;
int *p = &r;
*p += r;
return I;
}
Referring to the sample code above, what is the return value
of the function "f()"?
a) 12
b) 15
c) 24
d) 17
e) 30

Question Posted / uma sankar pradhan

2 Answers
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Answer Posted / uma sankar pradhan

int I=12;
int &r=I;
here r is a reference to I
r+=r/4;
=>r=r+r/4;
=>r=12+12/4;[r=I=12]
=>r=12+3
=>r=15
=>I=15

int *p=&r;
so, p is a pointer to r(i.e.,to I)

*p +=r;
=>*p = *p+r
=>*p=15+15
=>*p=30
=>I=30

so the return value of the f() is 30

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