// Static arrays are initialized to zero if not explicitly initialized.
#include <stdio.h>
void staticArrayInit( void ); // function prototype
void automaticArrayInit( void ); // function prototype
// function main begins program execution
int main( void )
{
puts( "First call to each function:" );
staticArrayInit();
automaticArrayInit();
puts( "\n\nSecond call to each function:" );
staticArrayInit();
automaticArrayInit();
} // end main
// function to demonstrate a static local array
void staticArrayInit( void )
{
// initializes elements to 0 first time function is called
static int array1[ 3 ];
size_t i; // counter
puts( "\nValues on entering staticArrayInit:" );
// output contents of array1
for ( i = 0; i <= 2; ++i ) {
printf( "array1[ %u ] = %d ", i, array1[ i ] );
} // end for
puts( "\nValues on exiting staticArrayInit:" );
// modify and output contents of array1
for ( i = 0; i <= 2; ++i ) {
printf( "array1[ %u ] = %d ", i, array1[ i ] += 5 );
} // end for
} // end function staticArrayInit
// function to demonstrate an automatic local array
void automaticArrayInit( void )
{
// initializes elements each time function is called
int array2[ 3 ] = { 1, 2, 3 };
size_t i; // counter
puts( "\n\nValues on entering automaticArrayInit:" );
// output contents of array2
for ( i = 0; i <= 2; ++i ) {
printf("array2[ %u ] = %d ", i, array2[ i ] );
} // end for
puts( "\nValues on exiting automaticArrayInit:" );
// modify and output contents of array2
for ( i = 0; i <= 2; ++i ) {
printf( "array2[ %u ] = %d ", i, array2[ i ] += 5 );
} // end for
} // end function automaticArrayInit
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