C语言程序：输入年月日，判断该年月日为这一年的哪一天

部分代码：intmain(intargc,char*argv[]){intmonth,days,year,days_per_year,i=0;charstr[]="Pleaseinputyear,month,days:\n";inta[12]={31,28,31,30,31,30,31,31,30,31,30,31};days_per_year=0;while(str[i]!='\0'){putchar(str[i]);Sleep(150);i++;}scanf("%d,%d,%d",&year,&month,&a