Lab8 王晨旭.docx
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Lab8王晨旭
Lab8DataStructures
OBJECTIVES
Aftercompletingthisexperiment,youwillbeableto:
●UseStructures
●Typecasting
PROCEDURES
PART1Createinstancesofstructure
Createastructurecalledcarwiththefollowingmembers:
●make
●model
●year
●miles
CreateaninstanceofthecarstructurenamedmyCarandassigndatatoeachofthemembers（e.g.make—Honda,model—CRV,year—2,miles--30000）.Printthecontentsofeachmemberusingprintf（）function
PrintScreenofResult:
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PART2“DateCalculation”usingstructures
（1）Definestructuretypeincludingyear、month、day.
（2）Definestructurevariable,andinitializethevariable.
（3）sumallthenumberofdaysintheyearstoredinthevariablesum,ifmeetingaleapyear,sum=sum+1;
#include〈stdio.h〉
structdate
{
intyear;
intmonth;
intday;
};
voidmain（）
{
structdated;
intsum=0;
printf（"\ninputthedate:
\n"）;
scanf（"%d%d%d",&d.year,&d.month,&d.day）;
switch（d.month）
{
case1:
sum=0;break;
case2:
sum=31;break;
case3:
sum=31+28;break;
case4:
sum=31+28+31;break;
case5:
sum=31+28+31+30;break;
case6:
sum=31+28+31+30+31;break;
case7:
sum=31+28+31+30+31+30;break;
case8:
sum=31+28+31+30+31+30+31;break;
case9:
sum=31+28+31+30+31+30+31+31;break;
case10:
sum=31+28+31+30+31+30+31+31+30;break;
case11:
sum=31+28+31+30+31+30+31+31+30+31;break;
case12:
sum=31+28+31+30+31+30+31+31+30+31+30;break;
}
sum+=d.day;/*天数累加*/
if（d.month>2）/*闰年处理*/
if（d.year%400==0||d.year%100!
=0&&d.year%4==0）
sum+=1;
printf（"Total:
%d\n",sum）;
}
Runtheprogram:
（1）Inputalegal（合理的）date,PrintScreenofResult:
（2）Inputadatewithanillegal（不合理的）month,PrintScreenofResult:
（3）Inputadatewithanillegalday,PrintScreenofResult:
（4）Rewritetheprogram,soitcangivetherightresultunderanycondition.重编，满足所有情况
PrintScreenofcode:
#include〈stdio.h〉
structdate
{
intyear;
intmonth;
intday;
};
voidmain（）
{
structdated;
intsum=0;
printf（"\ninputthedate:
\n"）;
scanf（"%d%d%d",&d.year,&d.month,&d.day）;
if（d.month<=12）{
switch（d.month）
{
case1:
sum=0;break;
case2:
sum=31;break;
case3:
sum=31+28;break;
case4:
sum=31+28+31;break;
case5:
sum=31+28+31+30;break;
case6:
sum=31+28+31+30+31;break;
case7:
sum=31+28+31+30+31+30;break;
case8:
sum=31+28+31+30+31+30+31;break;
case9:
sum=31+28+31+30+31+30+31+31;break;
case10:
sum=31+28+31+30+31+30+31+31+30;break;
case11:
sum=31+28+31+30+31+30+31+31+30+31;break;
case12:
sum=31+28+31+30+31+30+31+31+30+31+30;break;
}
sum+=d.day;/*天数累加*/
if（d.month>2）/*闰年处理*/
if（d.year%400==0||d.year%100!
=0&&d.year%4==0）
sum+=1;
printf（"Total:
%d\n",sum）;}
else
printf（“error”）;
}
PART3Inputandoutputofthestructure.
Fillintheblank.Writeaprogramtoinitialize初始化anarrayofstructuresthrough来自keyboard键盘
andthenoutputthevalueofthearray.输出值
#include
#include
main（）
{structdate
{intyear;
intmonth;
intday;
};
structstu
{charnum[12];
charname[20];
charsex;
intage;
structdatebirthday;
};
typedefstructstuSTU;
STUstudent[3];
inti;
/**********program*******************************/
/***usingforlooptoinputthethreeelements**/
/**********end*********************************/
for（i=0;i<3;i++）
{printf（"\nstudent[%d]num:
%s;name:
%s;sex:
%c;age:
%d;birthday:
%d.%d.%d",i,student[i].num,student[i].name,student[i].sex,student[i].age,student[i].birthday.year,student[i].birthday.month,student[i].birthday.day）;
}
getch（）;
}
PrintScreenofResult:
——————————————————
PART4PassingArraysofstructures.
Whatdoesthefollowingprogramprint?
#include
#include
structinfo
{
charitem[20];
doublecost;
};
voidsomeFunction（structinfo[]）;
intmain（void）
{
structinfodata[4]={{"nut",0.50},{"bolt",0.75}};
inti;
someFunction（data）;
for（i=0;i<4;i++）
printf（"%s,%.2f\n",data[i].item,data[i].cost）;
}
voidsomeFunction（structinfovalues[]）
{
inti;
for（i=0;i<2;i++）
if（values[i].cost>0.60）
{
strcpy（values[i+2].item,"washer"）;
values[i+2].cost=0.40;
}
else
{
strcpy（values[i+2].item,"hammer"）;
values[i+2].cost=12.00;
}
}
PrintScreenofResult:
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PART5TypeConversions.
（1）Automaticconversions
main（）
{
inta，b=−550；
charc='7'；
floatf1=3.142,f2；
a=b/c；/*integerdividedbyacharacter*/
printf（“a=%d\n”,a）；
a=f1；/*floattointegerconversion*/
printf（"f1=%f……a=%d\n",f1,a）；
f1=b；/*integertofloatconversion*/
printf（"b=%d……f1=%f\n"b,f1）；
f2=b/50.0；/*integerdividedbyafloat*/
printf（"b=%d，f2=%f\n",b,f2）；
}
PrintScreenofResult:
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（2）Typecasting
main（）
{floatx;
inti;
x=3.6;
i=（int）x;
printf（“x=%f,i=%d”,x,i）;
}
PrintScreenofResult:
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