Printf MCQ 6 : Constant Number Instead of Variable in Printf

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Printf Multiple Choice Questions  : Constant Number Instead of Variable in Printf 

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Predict the Output of the Following Program if Given Things are - 

• Two Variables are declared .
• Two Variables are initialized

#include<stdio.h>
void main()
{
int input1 = 10,input2 = 20;
printf("%d %d",100);
}

Options :

1. 100 20
2. Garbage 20
3. 20 10
4. Garbage 0

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Output :

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How and Why ?

1. Undefined Behavior of Printf
2. Click Here to See All Observation of Undefined Behavior 
3. Here First %d <---> 100
4.     Second %d <---> Latest Initialized Variable

What will Happen If Declaration Line is Replaced by This Line ?

int input1 = 10,input2;

Output :

100 10

Why ?

1. As Explained Above Here First %d <---> 100 
2. But Second %d Corresponds to Latest Initialized Variable which is input1 = 10

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Tags / Keywords : | printf : MCQ

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