Regarding Type Checking in C

[pradeepp]

Hi All,
I have one small doubt in C
I have written a below program

int main()
{
float a;
int b;
long c

c =a + b;
}

my question is when the type cheking will happen.
How should compiler will know a flaot, b int and c is long during execution.
Where these are stored... in map file?

Can any one explain me on this.

Thanks

[weaknessforcats]

The compiler is not there during execution so it doesn't know anything.

When you compiled your code, though, the compiler knew what the types of your variables were. Then when the calculation was compiled, it used that information convert your types to a type to be used for the calculation using a process call Arithmetic Conversions, which is part of the ANSI standard.

Everything you wrote in your code was converted to machine instructions.

It is those instructions that are being executed.