initializing static variable with a function call gives compilation error?

Question

#include 
int foo(){
    return 1;
}
int main(void) {
    static int q = foo(); 
    return 0;
}

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Answer 1

If you are doing this in C rather than C++ you can only assign static variables values that are available during compilation. So the use of foo() is not permitted due to its value not being determined until runtime.