Code:
#define 1Hour 3600
#define 3Days 259200
#define 7Days 604800
#define Permanent 0
new g_HighBanMenuValues[4] = {1Hour, 3Days, 7Days, Permanent};
Strings are null terminated arrays. The defines are preprocessor directives so that 1Hour, 3Days, and other symbols are replaced with the numeric value defined by it right before it is compiled.