”输入某年某月某日,判断这一天是这一年的第几天“用C语言怎样编程_百度...答:printf("Please input date(year,month,day):");/*提示输入年月日*/ scanf("%d-%d-%d",&year,&month,&day);/*输入年月日*/ printf("%d/%d/%d\n",year,month,day);days=sumday(month,day);/*计算天数的函数调用*/ if(leap(year)&&month>=3)/*调用判断是否闰年的函数,并且月份大于...