Lab8 王晨旭Word格式文档下载.docx

1、（2） Define structure variable, and initialize the variable.（3） sum all the number of days in the year stored in the variable sum, if meeting a leap year, sum=sum+1;#include stdio.hstruct date int year; int month; int day;void main（） struct date d; int sum=0; printf（n input the date:n）; scanf（%d%d%d,

2、&d.year,&d.month,&d.day）; switch（d.month） case 1:sum=0;break; case 2:sum=31; case 3:sum=31+28; case 4:sum=31+28+31; case 5:sum=31+28+31+30; case 6:sum=31+28+31+30+31; case 7:sum=31+28+31+30+31+30; case 8:sum=31+28+31+30+31+30+31; case 9:sum=31+28+31+30+31+30+31+31; case 10:sum=31+28+31+30+31+30+31+3

3、1+30; case 11:sum=31+28+31+30+31+30+31+31+30+31; case 12:sum=31+28+31+30+31+30+31+31+30+31+30; sum+=d.day; /* 天数累加 */ if（d.month2） /* 闰年处理 */ if（d.year%400=0|d.year%100!=0&d.year%4=0） sum+=1;Total: %dn,sum）;Run the program :（1） Input a legal（合理的） date, Print Screen of Result:（2） Input a date with an

4、 illegal（不合理的） month, Print Screen of Result:（3） Input a date with an illegal day, Print Screen of Result:（4） Rewrite the program, so it can give the right result under any condition.重编，满足所有情况Print Screen of code: if（d.month=12） else printf（“error”）;PART3 Input and output of the structure.Fill in th

5、e blank . Write a program to initialize初始化 an array of structures through 来自keyboard键盘, and then output the value of the array.输出值#include string.hmain（） struct date int year; ;struct stu char num12; char name20; char sex; int age; struct date birthday; ;typedef struct stu STU;STU student3;int i;/*p

6、rogram*/*using for loop to input the three elements*/*end*/ for（i=0;i3;i+） printf（nstudent%d num:%s;name:sex:%c;age:%d;birthday:%d.%d.%d,i,studenti.num,studenti.name,studenti.sex,studenti.age,studenti.birthday.year,studenti.birthday.month,studenti.birthday.day）; getch（）;PART4 Passing Arrays of struc

7、tures.What does the following program print?struct infochar item20;double cost; ;void someFunction（struct info ）;int main（void）struct info data4 = nut, 0.50, bolt, 0.75 ;someFunction（data）;for（i = 0; i 0.60 ）strcpy（ valuesi+2.item, washer ）;valuesi+2.cost = 0.40;elsehammervaluesi+2.cost = 12.00;PART

8、5 Type Conversions.（1） Automatic conversionsmain（ ） int a，b=550； char c=7； float f1=3.142,f2； a=b/c； /* integer divided by a character */ printf（“a=%dn”,a）； a=f1； /* float to integer conversion */ f1=%fa=%dn,f1,a）； f1=b； /* integer to float conversion */ b=%df1=%fnb,f1）； f2=b/50.0；/* integer divided by a float */ b=%d，f2=%fn,b,f2）；（2） Type casting float x; int i; x=3.6; i=（int）x; printf（“x=%f,i=%d”,x,i）;