学生成绩管理系统v3.0

#include<stdio.h>#include<string.h>#include<stdlib.h>#define N 50//最大人数#define G 150//字符串个数int average1(int score[], int n);void printfscore1(int score[],long num[],intn,char name[][10]);//输出学号和考试成绩void searchname(long num[], int n, char name[][10], int score[], char f[]);/*查找姓名得出排名和成绩*/int search(long num[], long z, int n);//查找学号得出排名void readscore(int score[], char name[][10],int n, long num[]);//读入学号和考试成绩和姓名int average2(int score[], int n);//求学生的的总平均分void datasort1(int score[], long num[], intn,char name[][10]);//成绩由高到低进行排序void datasort2(int score[], long num[], intn,char name[][10]);//void datasort3(int score[], long num[], intn,char name[][10]);//成绩由低到高进行排序void sortstring(char name[][10], int n, int score[], long num[]);//按姓名的字典顺序进行排序main(){char name[G][10];//定义二维字符数组char f[10];int score[N];intchoice,n,x,pos;longnum[N],z,y;inti;float a = 0, b = 0, c = 0, d = 0, e = 0;//表示学生的成绩等级高低printf("请输入学生人数：");scanf("%d", &n);readscore(score, name, n, num);//读入分数名字和学号do {menu();//输出菜单scanf("%d", &choice);switch (choice) {case 1:x = average1(score, n);//求学生的总分y = average2(score, n);//求学生的的总平均分printf("学生总平均分为%d,总分为%d", y,x);break;case 2:datasort1(score,num, n,name);//成绩由高到低进行排序printf("学生成绩按高到低排序如下：\n");printfscore1(score,num, n,name);break;case 3:datasort3(score, num, n,name);//成绩由低到高进行排序printf("学生成绩按低到高排序如下：\n");printfscore1(score, num, n,name);break;case 4:datasort2(score,num, n,name);//按学号由小到大排出成绩表printf("学生学号按低到高排序如下：\n");printfscore1(score,num, n,name);break;case 5:printf("按姓名的字典顺序排出成绩表：\n");sortstring(name, n, score, num);break;case 6:printf("请输入要查找的学生学号：");scanf("%ld", &z);datasort1(score, num, n,name);pos = search(num, z, n);//搜索学号if (pos != -1)printf("score=%d，排名为%d\n", score[pos],pos+1 );elseprintf("没有找到\n");break;case 7:printf("请输入要查找的学生姓名：");getchar();gets(f);//输入姓名searchname(num, n, name, score, f);//查找名字得出排名和成绩break;case 8:printf("等级分类如下：\n");for (i = 0;i<n;i++){if (score[i] >= 90){a++;}else if (score[i] >= 80){b++;}else if (score[i] >= 70){c++;}else if (score[i] >= 60){d++;}else{e++;}}printf("优秀(90-100)有%.0f个,良好(80-89)有%.0f个，中等(70-79)有%.0f个，及格(60-69)有%.0f个，不及格(0-59)有%.0f个\n", a, b, c, d, e);printf("优秀(90-100)占%.2f,良好(80-89)占%.2f，中等(70-79)占%.2f，及格(60-69)占%.2f，不及格(0-59)占%.2f", a /n, b / n, c / n, d / n, e / n);break;case 9:for (i = 0;i<n;i++){printf("%ld,%d,%s\n", num[i], score[i],name[i]);}break;case 0:break;default:printf("你输入的数有误，请重新输入正确的数");//处理非法字符}getchar();getchar();}while (choice != 0);}int menu()//输出菜单{printf("*****************学生成绩系统*******************\n");printf("1、Caculate total and average score of course\n");printf("2、Sort in descending order by score\n");printf("3、Sort in ascending order by score\n");printf("4、Sort in ascending order by number\n");printf("5、Sort in dictionary order by name\n");printf("6、Search by number\n");printf("7、Search by name\n");printf("8、Statistic analysis\n");printf("9、List record\n");printf("0、Exit\n");printf("**********************************\n");printf("Please enter your choice:");}int average1(int score[], int n)//求学生的总分{inti, sum = 0;for (i = 0;i <n;i++){sum += score[i];}return sum;}void printfscore1(int score[],long num[],intn,char name[][10])//输出学号和考试成绩{inti;for (i = 0;i<n;i++){printf("%ld,%d,%s\n", num[i], score[i],name[i]);}}void searchname(long num[], int n, char name[][10], int score[], char f[])/*查找名字得出排名和成绩*/{inti, d=1,pos=-1;for (i = 0;i <n;i++){if (strcmp(name[i], f) == 0)pos = i;}if (pos == -1){printf("没有找到！\n");}else{for ( i = 0; i< n; i++){if (score[i] > score[pos]){d++;}}}printf("您输入要查询的学生%s的排名是%d考试成绩是%d\n", name[pos], d, score[pos]);}int search(long num[], long z, int n)//搜索学号{inti;for (i = 0;i <n;i++){if (num[i] == z)returni;}return -1;}void readscore(int score[], char name[][10],int n, long num[])//读入学号和考试成绩和姓名inti ;for (i = 0;i <n;i++){printf("请输入学生的学号,姓名和成绩");scanf("%ld",&num[i]);scanf("%s",name[i]);scanf("%d", &score[i]);getchar();}}int average2(int score[], int n)//求学生的的总平均分{inti, sum = 0;for (i = 0;i <n;i++){sum += score[i];}return sum/n;}void datasort1(int score[], long num[], intn,char name[][10])//成绩由高到低进行排序{inti, j;int temp1;long temp2;char temp[10];for (i = 0;i<n - 1;i++){for (j = i + 1;j<n;j++){if (score[j]>score[i]){temp1 = score[j];temp2 = num[j];strcpy(temp, name[i]);score[j] = score[i];num[j] = num[i];strcpy(name[i], name[j]);score[i] = temp1;num[i] = temp2;strcpy(name[j], temp);}}}}void datasort2(int score[], long num[], intn,char name[][10])//按学号由小到大排出成绩表{inti, j;int temp1;long temp2;char temp[10];for (i = 0;i<n - 1;i++){for (j = i + 1;j<n;j++){if (num[i]>num[j]){temp1 = score[j];temp2 = num[j];strcpy(temp, name[i]);score[j] = score[i];num[j] = num[i];strcpy(name[i], name[j]);score[i] = temp1;num[i] = temp2;strcpy(name[j], temp);}}}}void datasort3(int score[], long num[], intn,char name[][10])//成绩由低到高进行排序{inti, j;int temp1;long temp2;char temp[10];for (i = 0;i<n - 1;i++){for (j = i + 1;j<n;j++){if (score[i]>score[j]){temp1 = score[j];temp2 = num[j];strcpy(temp, name[i]);score[j] = score[i];num[j] = num[i];strcpy(name[i], name[j]);score[i] = temp1;num[i] = temp2;strcpy(name[j], temp);}}}}void sortstring(char name[][10], int n, int score[], long num[])//按姓名的字典顺序进行排序{inti, j;int temp1;long temp2;char temp[10];for (i = 0;i<n - 1;i++){for (j = i + 1;j<n;j++){if (strcmp(name[j], name[i]) < 0){temp1 = score[j];temp2 = num[j];strcpy(temp, name[i]);score[j] = score[i];num[j] = num[i];strcpy(name[i], name[j]);score[i] = temp1;num[i] = temp2;strcpy(name[j], temp);}}}for (i = 0;i<n;i++){printf("%ld,%s,%d\n", num[i], name[i], score[i]);}}。