#include#include#include#includemain(){ time_t start,end; struct date d1,d2; struct time t; long second,min,hour,day; char *str; d1.da_year=2008; d1.da_mon=3; d1.da_day=16; d2.da_year=2009; d2.da_mon=10; d2.da_day=6; t.ti_hour=0; t.ti_min=0; t.ti_sec=0; start=dostounix(&d1,&t); end=dostounix(&d2,&t); second=end-start; min=second/60; hour=min/60; day=hour/24; str=ctime(&end); printf(＂ %s\n＂,str); str=ctime(&start); printf(＂- %s\n-----------------------------\n＂,str);printf(＂%-10d day\n\n＂,day); getch();}...