What is the output of this C code? #include union p { int x; float y; }; int main() { union p p, b; p.x = 10; printf("%f\n", p.y); }

C Programming Language Union in C Language

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Q: What is the output of this C code?


    #include <stdio.h>
    union p
    {
        int x;
        float y;
    };
    int main()
    {
        union p p, b;
        p.x = 10;
        printf("%f\n", p.y);
    }

A Compile time error
B Implementation dependent
C 10.000000
D 0.000000
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Union is an user defined datatype in C programming language. It is a collection of variables of different datatypes in the same memory location. We can define a union with many members, but at a given point of time only one member can contain a value. Unions can be very handy when you need to talk to peripherals through some memory mapped registers.

Q: What is the output of this C code? #include <stdio.h> union p { int x; float y; }; int main() { union p p, b; p.x = 10; printf("%f\n", p.y); }

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Q: What is the output of this C code?