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Embedded and Microcontrollers
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Embedded and Microcontrollers
Embedded Forum Migrating from 18f to dsPIC33
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Migrating from 18f to dsPIC33

JohnDSiviter
JohnDSiviter over 15 years ago

Hi doing what I say in the title, just come to write my first dsPIC program and notice instead of:

 

 

For the C18 compiler:

 

 

void main()

{

Do something;

}

 

 

For the C30 compiler:

 

 

int main(void)

{

Do something;

}

 

 

So why when moving onto dsPICs do they use a return value for main?, has it got a purpose?

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  • Jorge_Garcia
    Jorge_Garcia over 15 years ago

    Hi John,

     

    Either option is acceptable some programmers like to use int main(void) even if the main function as we know isn't going to return a value.

     

    It's a matter of preference, your first example should work as well. I usually do:

     

    void main(void)

    {

         Do something;

    }

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  • JohnDSiviter
    JohnDSiviter over 15 years ago in reply to Jorge_Garcia

    Hi Jorge,

     

    So it has no purpose and seems to be down to tradition?, the next question must then be, why did Microchip change from 'void main' to 'int main'?

    J.

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  • JohnDSiviter
    JohnDSiviter over 15 years ago in reply to Jorge_Garcia

    Hi Jorge,

     

    So it has no purpose and seems to be down to tradition?, the next question must then be, why did Microchip change from 'void main' to 'int main'?

    J.

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  • Jorge_Garcia
    Jorge_Garcia over 15 years ago in reply to JohnDSiviter

    Microchip didn't change,

     

    The programmer that wrote the app note for the PIC18, is not the same programmer who wrote the DSPIC app note. Plain and simple, two different people wrote two different notes they are both correct and neither has an advantage over the other. C is C and always will be C that's why we love it.

     

    hth,

    Jorge Garcia

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