C语言大作业——学生成绩管理系统v2.0

成绩管理系统 v2 0 include include define N 30 void Input long num int score int n void Totalave int score int n void Scoredes long num int score int n int compare int a int b int Ascending int a int b void Numas long num int score int n void Search long num int score int n int x void statistis long num int score int n void List long num int score int n int main int n score N c x i long num N printf 输入学生人数 scanf d printf 1 Input record n printf 2 Caculate totel and average score of course n printf 3 Sort in descending order by score n printf 4 Sort in ascending order by number n printf 5 Search by number n printf 6 Statistic analysis n printf 7 List record n printf 0 Exit n printf Please enter your choice n printf n for scanf d switch c case 1 Input num score n printf Please enter your choice n break case 2 Totalave score n printf Please enter your choice n break case 3 Scoredes num score n Ascending for i 0 i n i printf ID 10ld score d n num i score i 以长整形打印用 ld printf Please enter your choice n break case 4 Numas num score n printf Please enter your choice n break case 5 printf 请输入查找学号 n scanf d Search num score n x printf Please enter your choice n break case 6 statistis num score n printf Please enter your choice n break case 7 List num score n Totalave score n printf Please enter your choice n break case 0 exit 0 return 0 void Input long num int score int n int i for i 0 i n i printf Input student s ID and score scanf ld d void Totalave int score int n int i sum 0 double ave for i 0 i n i sum sum score i ave double sum n printf Caculate total d average score of course f n sum ave void Scoredes long num int score int n int compare int a int b int i j k t h for i 0 i n i k i for j i 1 j n j if compare score j score k k j if i k t score k h num k score k score i num k num i score i t num i h int Ascending int a int b return a b void Numas long num int score int n int i j k t h for i 0 i n i k i for j i 1 j n j if num j num k k j if i k t score k h num k score k score i num k num i score i t num i h for i 0 i n i printf ID 10ld score d n num i score i 以长整形打印用 ld void Search long num int score int n int x int high n 1 low 0 mid c 0 pos find 0 i j k t h for i 0 i n i k i for j i 1 j n j if num j num k k j if i k t score k h num k score k score i num k num i score i t num i h while find 0 else if x num mid high mid 1 else pos mid find 1 if find 0 printf not find n else for i 0 iscore pos c printf ID 10ld order d score d n num pos c 1 score pos void statistis long num int score int n int a 0 b 0 c 0 d 0 e 0 i double A B C D E for i 0 i 90 a else if score i 80 b else if score i 70 c else if score i 60 d else e A double a n 100 B double b n 100 C double c n 100 D double d n 100 E double e n 100 printf 优秀人数 d 百分比 f n a A printf 良好人数 d 百分比 f n b B printf 中等人数 d 百分比 f n c C