Why we must initialize a variable before using it? [closed]
int count = 0;

while(count < 500)
{
   doFunction();
   count ++;
}

...


void doFunction() {

   count = sizeof(someString);
   print(count);

}

int i = 0;
int j = foo();

struct Foo { int i; int j; }

struct Foo f = {0};

int i ;  // uninitialised variable

i = some_function() ;  // variable is "used" in left of assignment expression.
some_other_function( i ) ; // value of variable is used