Gate C Program question about format specification property

Question

Consider a C Program situation like this,
 

main()
    {
    float a=2.23564;
    printf("%d",a);
    }

Then what will be the output??
please help me..

Answer 1

As here a is declared as float and a=2.23564

%d specifier is used to print some integer value but here a is declared as float so some garbage value will be printed as output.

Comments

https://ideone.com/3R6t5V

sir this is the output

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Undefined means compiler is free to output anything. Simply speaking, most compilers are just outputting whatever is in the Integer register when they see "%d" but the float value is passed in FLOAT registers. But a new compiler or new system may do differently - that is why this is undefined behaviour. Instead of wasting time on such undefined stuffs, focus on questions which are relevant for GATE or real programming.

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thank you sir