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Editorial Team
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Asked: 2026-05-22T11:31:01+00:00

A stream of chars are sent out to a communication device. For readability purposes,

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A stream of chars are sent out to a communication device. For readability purposes, i wrote inidividual configurations as variables: 

unsigned char a1;
unsigned char a2;
unsigned char a3;
unsigned char a4;
unsigned char a5;
std::string a6;
unsigned char a7;
unsigned char a8;

What is the best way to pack it into a variable tightly so that it’s aligned perfectly?
Till now I’ve think of put everything into a struct.

edit: struct doesn’t look like a viable option since struct doesn’t hold string, and string is varying in size, although is a one time declared thing. Compiled in GCC

edit2: Gonna go with packed struct method, but will convert the string to a c_str first. Until a better answer, this is the way to be.

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1 Answer

  1. Editorial Team

    A packed structure, rather than just a structure would be more appropriate.

    EDIT: Ofcourse, you should not use string as a part of your structure, It skipped me while answering but as others have pointed out. You should conver string to character array using str.c_str()); and then store the same in the packed structure.

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