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Control Instructions - Programming

Q1:

What will be the output of the program? 
#include<stdio.h>
int main()
{
    float a = 0.7;
    if(0.7 > a)
        printf('Hi\n');
    else
        printf('Hello\n');
    return 0;
}

A Hi

B Hello

C Hi Hello

D None of above

ANS:A - Hi

Answer: Option
Explanation:
Step 1: int a=0, b=1, c=3; here variable a, b, and c are declared as integer type and initialized to 0, 1, 3 respectively. Step 2: *((a) ? &b : &a) = a ? b : c; The right side of the expression(a?b:c) becomes (0?1:3). Hence it return the value '3'. The left side of the expression *((a) ? &b : &a) becomes *((0) ? &b : &a). Hence this contains the address of the variable a *(&a). Step 3: *((a) ? &b : &a) = a ? b : c; Finally this statement becomes *(&a)=3. Hence the variable a has the value '3'. Step 4: printf('%d, %d, %d\n', a, b, c); It prints '3, 1, 3'.