C語言編寫 輸入年月日,輸出這個日期的下一天的日期

#include <stdio.h> main() { int year,month,day,flag=0; m: printf("Please input year month day:"); scanf("%d%d%d",&year,&month,&day); if((year%4==0&&year%100!=0)||year%400==0) flag=1; if(mon

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