how can we Declare a variable in c without defining it.
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Answer / manoj
By using EXTRN.
Example:
File 1:
int GlobalVariable; // implicit definition
void SomeFunction(); // function prototype
(declaration)
int main() {
GlobalVariable = 1;
SomeFunction();
return 0;
}
File 2:
extern int GlobalVariable; // explicit declaration
void SomeFunction() { // function header (definition)
++GlobalVariable;
}
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