教材第四章习题

教材第四章习题 第一题 include include main double a s scanf lf if a 0 printf The number is error else s sqrt a printf f s 第 2 题 include include void main double x y scanf lf if x 0 else y x 3 pow x 3 9 printf y f y 第三题 第一种方法 include void main int a scanf d if a 0 第 2 种方法 include void main int a t printf input date n scanf d t a 10 switch t case 1 case 2 case 3 case 4 case 5 printf E n break case 6 printf D n break case 7 printf C n break case 8 printf B n break case 9 case 10 printf A n break 第四题 include include void main double x y z scanf lf lf if x 0 printf z f z if x 0 printf x f z if x 0 printf x f z 第五题 include include void main double a b c x y z s area scanf lf lf lf x a b c y a c b z c b a if x 0 area sqrt s s a s b s c printf area f n area else printf error n 第六题 include include void main int a printf input a figer n scanf d switch a case 1 printf 星期 1 break case 2 printf 星期 2 break case 3 printf 星期 3 break case 4 printf 星期 4 break case 5 printf 星期 5 break case 6 printf 星期 6 break case 7 printf 星期 7 break 第七题 include void main int y m d i mon 0 sum 0 int a 13 0 31 28 31 30 31 30 31 31 30 31 30 31 printf inpur y m d n scanf d d d if m12 d31 printf error n exit 0 if y 4 0 for i 0 i m i mon a i sum mon d printf sum d sum 第八题 include void main int n s 1 i x printf input n n scanf d printf input n figers n for i 0 i n i scanf d if x 2 0 s x printf s d s 第九题 include include void main int a t sum 0 d printf input a figer n scanf d if a 0 printf error n exit 0 do t a 10 sum sum t d a a d 10 while a 0 printf sum d sum 第十题 include void main int n a 0 b 0 c 0 i double x printf input n n scanf d printf input n figers n for i 0 i n i scanf lf if x0 c printf 负数个数 d n a printf 零个数 d n b printf 正数个数 d n c 第十一题 include void main int n 10 i double x y printf input 10 figers n scanf lf for i 0 i n 1 i scanf lf y y x y x printf the low figer is f n y 第 12 题 include void main int n 10 i double x mix max sum aver t printf 请输入 10 个选手的评分 n scanf lf max t mix t sum t for i 0 i n 1 i scanf lf if x 0 t 0 printf error exit 0 sum x mix mixx max x aver sum max mix 8 printf aver f aver 第十三题 include void main int x 65 n 90 i for i x i 90 i printf c ASCII d t i i printf n 第十四题 include include void main int i x y z t h for i 100 i 1000 i x pow i 100 3 t i 10 y pow t 10 3 z pow i 10 3 h x y z if h i printf i d t i 第十五题 include include void main int n double i sum 0 t printf input n n scanf d for i 1 i n i t pow 1 i 1 i sum t printf sum f sum 第十六题 include void main int i double h c for i 30 i 40 i h i c 5 h 32 9 printf h f tc f n h c 第十七题 include include void main int n double i sum 0 a 81 printf input n n scanf d for i 0 i n i sum a a sqrt a printf sum f sum 第十八题 include void main int i j t for i 1 i 10 i for j 1 j i j t j i printf d d d t j i t printf n 第十九题 include void main int a 1 i s 0 for i 0 i 10 i s s 1 2 printf s d n s 第 20 题 include void main int i j h n printf inpur n n scanf d for i 1 i n i for j 0 j n i j printf t for h 0 h 2 i 1 h printf printf t printf n 第 2 小题 include void main int i j h n printf inpur n n scanf d for i 1 i n i for j 0 j n i j printf t for h 0 h 2 i 1 h printf printf t printf n for i 1 i n i for j 1 j i j printf t for h 0 h n i 2 1 h printf printf t printf n 第 21 题 include include void main int a b i j t z printf input a b n scanf d d z a a az b z for i a i b i for j 2 t 2 j i j if i j 0 t 0 只要有一个被 i 整除 t 值就立刻改变 就说明不是素数 if t 2 printf d t i printf n 第 22 题 include include void main double x mix max f x 2 max pow x 2 3 14 x 6 mix pow x 2 3 14 x 6 while x 2 mix mix f mix f printf max f mix f max mix 第 23 题 include include void main int n 0 f i j t for i 39 i 40 i f i i i 41 for j 2 t 1 j f j if f j 0 t 0 if t 1 printf d d t i f n if n 80 printf not all is n 阳历的 日历 include include void main int m i j n 0 y 2010 wo w a printf input the form of year month t scanf d d 输入格式的决定 if y 4 0 else a 28 闰年的判断及 2 月日数的确定 if m12 printf month is not exit please input later n exit 0 wo y y 1 4 y 1 100 y 1 400 7 1 月 1 日的算法 wo 表示 for i 0 i 55 i printf 的输入 printf n for j 1 j 7 j printf 星期 d t j 星期的输入 printf n 表前的建造 switch m case 1 for i 1 i wo i printf t n for j 1 j 31 j if n 7 0 printf n printf d t j n break 1 month case 2 w wo 31 7 for i 1 i w i printf t n for j 1 j a j if n 7 0 printf n printf d t j n break 2 month case 3 w wo 31 a 7 for i 1 i w i printf t n for j 1 j 31 j if n 7 0 printf n printf d t j n break 3 month case 4 w wo 31 a 31 7 for i 1 i w i printf t n for j 1 j 30 j if n 7 0 printf n printf d t j n break 4 month case 5 w wo 31 a 31 30 7 for i 1 i w i printf t n for j 1 j 31 j if n 7 0 printf n printf d t j n break 5 month case 6 w wo 31 a 31 30 31 7 for i 1 i w i printf t n for j 1 j 30 j if n 7 0 printf n printf d t j n break 6 month case 7 w wo 31 a 31 30 31 30 7 for i 1 i w i printf t n for j 1 j 31 j if n 7 0 printf n printf d t j n break 7 month case 8 w wo 31 a 31 30 31 30 31 7 for i 1 i w i printf t n for j 1 j 31 j if n 7 0 printf n printf d t j n break 8 month case 9 w wo 31 a 31 30 31 30 31 31 7 for i 1 i w i printf t n for j 1 j 30 j if n 7 0 printf n printf d t j n break 9 month case 10 w wo 31 a 31 30 31 30 31 31 30 7 for i 1 i w i printf t n for j 1 j 31 j if n 7 0 printf n printf d t j n break 10 month case 11 w wo 31 a 31 30 31 30 31 31 30 31 7 for i 1 i w i printf t n for j 1 j 30 j if n 7 0 printf n printf d t j n break 11 month case 12 w wo 31 a 31 30 31 30 31 31 30 31 30 7 for i 1 i w i printf t n for j 1 j 31 j if n 7 0 printf n printf d t j n break 12 month printf n for i 0 i 55 i printf printf n 表尾的处理 include include void main int m i j n 0 y 2010 wo w a printf input the form of year month t scanf d d 输入格式的决定 if y 4 0 else a 28 闰年的判断及 2 月日数的确定 if m12 printf month is not exit please input later n exit 0 wo y y 1 4 y 1 100 y 1 400 7 1 月 1 日的算法 wo 表示 for i 0 i 55 i printf 的输入 printf n for j 1 j 7 j printf 星期 d t j 星期的输入 printf n 表前的建造 switch m case 1 for i 1 i wo i printf t n for j 1 j 31 j if n 7 0 printf n printf d t j n break 1 month case 2 w wo 31 7 for i 1 i w i printf t n for j 1 j a j if n 7 0 printf n printf d t j n break 2 month case 3 w wo 31 a 7 for i 1 i w i printf t n for j 1 j 31 j if n 7 0 printf n printf d t j n break 3 month case 4 w wo 31 a 31 7 for i 1 i w i printf t n for j 1 j 30 j if n 7 0 printf n printf d t j n break 4 month case 5 w wo 31 a 31 30 7 for i 1 i w i printf t n for j 1 j 31 j if n 7 0 printf n printf d t j n break 5 month case 6 w wo 31 a 31 30 31 7 for i 1 i w i printf t n for j 1 j 30 j if n 7 0 printf n printf d t j n break 6 month case 7 w wo 31 a 31 30 31 30 7 for i 1 i w i printf t n for j 1 j 31 j if