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下列程序可以计算某年某月有几天,以及闰年与平年的2月天数不同。判别闰年的条件:能被4整除但不能被100整除的年是软年,或者能被400整除的年也是闰年。请在程序的下划线处填入正确的内容,使程序得到正确的结果。 #include
int main( ) { int yy,mm,days; printf("input year and month:"); scanf("%d %d",&yy,&mm); switch(mm) { case 1: case 3: case 5: case 7: case 8: case 10: case 12: ________1________; break; case 4: case 6: case 9: case 11: days=30; break; case 2: if(yy%4= =0&&yy%100!=0||____2_____) _ _______ 3 ________; else days=28; break; default: printf("input error");break; } printf("the days of %d %d is %d\n",yy,mm,days); }