C语言练习答案.ppt

练习一参考2 2 22 23 5858584 2615 166 07 1 0 18 19 503 练习二参考522 36543 104 55 126 1237 练习三参考42 203 1010914 05 x 5 y 4 a 16 207 a 2 b 18 12457810 练习四参考a i 1 ia 9 i a i 2 1432583 584 06505 杨辉5行 includevoidmain inta 5 5 i j k for i 0 i 5 i for j 0 j i j if j 0 j i a i j 1 elsea i j a i 1 j 1 a i 1 j for i 0 i 5 i for k 0 k 4 i k printf for j 0 j i j printf 2d a i j printf n 0 1000偶数和 includevoidmain inti sum 0 for i 0 i 1000 i 2 sum i printf d sum 练习五参考c2 d3 c4 a5 b6 d7 c8 abc9 B10 67 10 103 8 43 1611 Inta 2b 0写出表达式 运算后a和b的值是多少 一 a 一 a 2b 0 二 a 3b 0 练习六参考1 2 3 4 5 a6 7897 fac i Staticint8 8 17 练习七参考0111222 243 164 BBB 5 4 3 56 a7 848 10 987687611 abc ABC bc BC c C12 HOWhowdoyoudo13 efgh14 b 练习七参考15 d16 d17 d18 b19 b20 B21 C22 D 99表 includevoidmain introw col for row 1 row 9 row printf n for col 1 col row col printf d d 2d col row row col printf n 实验三改错1 1 includemain inti num scanf d 实验三改错1 2 includevoidmain inti j floatg ave for i 0 i 6 i floatsum 0 for j 1 j 5 j scanf f 实验三填空2 1 includemain inti m n scanf d d 实验三填空2 2 includemain intx y for x 1 x 29 x y 30 x if 2 x 4 y 90 printf d d x y 统计字符个数 includemain charc intletter 0 space 0 digit 0 other 0 printf 请输入一行字符 n while c getchar n if c a 求3X3矩阵主对角线元素之和 includevoidmain intdata 3 3 1 2 3 4 5 6 7 8 9 inti j doublesum 0 0 for i 0 i 3 i for j 0 j 3 j if i j sum sum data i j printf f n sum 实验四改错题1 includemain inta 5 2 4 6 8 10 i for i 0 imain inta 10 i for i 0 imain charstr 15 China nShanghai puts str 实验四填空 includemain chars 80 inti j gets s for i j 0 s i 0 i if s i a s j s i s j 0 puts s 实验五改错题1 1 includeintsum inta intb return a b voidmain intx 3 y 4 printf d n sum x y 实验五填空 includefloataverage floatarray 10 inti floataver sum array 0 for i 1 i 10 i sum sum array i aver sum 10 return aver main floatscore 10 aver inti for i 0 i 10 i scanf f 实验五改错题1 2 includemain inta b c x intmax intx inty scanf d d d 实验七改错题1 1 includevoidmain intx 10 y 5 px py px 实验七3填空 include defineN10voidmain floataverage float p intn floatnum N aver inti for i 0 i N i scanf f 实验七改错题1 2 includevoidmain inta 10 1 2 3 4 5 6 7 8 9 10 i p for p a i 0 ivoidmain inta 10 1 2 3 4 5 6 7 8 9 10 p for p a p a 10 p printf d p 练习八参考structSTRU2 structnode 3 c4 c5 d6 c7 b8 feof fp 或者feof fp 0 实验七3填空 用随机数产生数据 include include include defineN10voidmain floataverage float p intn floatnum N aver inti for i 0 i N i num i float rand 100 for i 0 i N i printf 4 0f n num i aver average num N printf 4 0f n aver floataverage float p intn inti floatsum 0 0 ave for i 0 i n i sum sum p i ave sum n return ave 练习九参考objcexe2 9 11 9 103 524 b5 a6