What will be the output of the program? #include int main() { struct byte { int one:1; }; struct byte var = {1}; printf("%d\n", var.one); return 0; }

C Programming Language Union in C Language

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Q: What will be the output of the program?


#include<stdio.h>

int main()
{
    struct byte
    {
        int one:1;
    };
    struct byte var = {1};
    printf("%d\n", var.one);
    return 0;
}

A 1
B -1
C 0
D Error
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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 will be the output of the program? #include<stdio.h> int main() { struct byte { int one:1; }; struct byte var = {1}; printf("%d\n", var.one); return 0; }

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Q: What will be the output of the program?