Initializing 1-dimensional arrays

• initialize the elements at run-time, by executing statements to assign values to the elements:

  #define N 5 int myarray[ N ]; .... for(int i=0 ; i < N ; ++i) { myarray[ i ] = i; }

• we may initialize the values at compile-time, by telling the compiler what values to initially store in the memory represented by the array. We use curly-brackets (braces) to provide the initial values:

  #define N 5 int myarray[ N ] = { 0, 1, 2, 3, 4 };

• we may initialize the values at compile-time, by telling the compiler what values to initially store in the memory represented by the array, and having the compiler determine the number of elements in the array(!).

  int myarray[ ] = { 0, 1, 2, 3, 4 }; #define N (sizeof(myarray) / sizeof(myarray[0]))

• or, we may initialize just the first few values at compile-time, and have the compiler initialize the rest with zeroes:

  #define HUGE 10000 int myarray[ HUGE ] = { 4, 5 };