printf(" %8.2f\n",stu[i].avr);
}
printf("average=%5.2f\n",average);
}
17. 打印以下图案:
*****
*****
*****
*****
*****
#include<stdio.h>
void main()
{
char a[5]={'*','*','*','*','*'};
int i,j,k;
char space=' ';
printf("The picture is:");
for(i=0;i<5;i++)
{
printf("\n");
printf(" ");
for(j=1;j<=i;j++)
printf("%c",space);
for(k=0;k<5;k++)
printf("%c",a[k]);
}
printf("\n");
}
18.给出年、月、日,计算该日是该年的第几天。
#include<stdio.h>
void main()
{
int sum_day(int,int);
int leap(int year);
int year,month,day,days;
printf("input date(year,month,day):");
scanf("%d,%d,%d",&year,&month,&day);
printf("%d/%d/%d",year,month,day);
days=sum_day(month,day);
if(leap(year)&&month>=3)
days=days+1;
printf("is the %dth day in this year.\n",days);
}
int sum_day(int month,int day)
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