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carrayscompiler-construction

initial value of int array in C

When declaring an array in C like this:

int array[10];

What is the initial value of the integers?? I'm getting different results with different compilers and I want to know if it has something to do with the compiler, or the OS.

Solution

  • If the array is declared in a function, then the value is undefined. int x[10]; in a function means: take the ownership of 10-int-size area of memory without doing any initialization. If the array is declared as a global one or as static in a function, then all elements are initialized to zero if they aren't initialized already.