Definition of global variables using a non constant initializer

Question

#include 

int i=10;
int j=i;
int main()
{
    printf(\"%d\",j);
}

I get an error stating that initialization element is not a const

Answer 1

You could try using:

int i=10;
int j=0;

int main()
{
   j=i;//This should be the first statement in the main() and you achieve the same functionality as ur code
   return 0;
}

The only true C way is to initialize it at runtime. Although in C++ your code will work fine, without any compilation errors.

The C standard clearly prohibits initialization of global objects with non-constant values. The Section 6.7.8 of the C99 standard says:

All the expressions in an initializer for an object that has static storage duration shall be constant expressions or string literals.

The definition of an object with static storage duration is in section 6.2.4:

An object whose identifier is declared with external or internal linkage, or with the storage-class specifier static has static storage duration. Its lifetime is the entire execution of the program and its stored value is initialized only once, prior to program startup.