int leap(int year){ if((year%4==0&&year%100!=0)||year%400==0)return (1);else return (0);} int number(int year,int m,int d){ int i,sum=0;int a[12]={31,28,31,30,31,30,31,31,30,31,30,31};int b[12]={31,29,31,30,31,30,31,31,30,31,30,31};if(...