#include <string.h>
const int MAX_NUM = 5;
const double MAX_NUMS = 5.0;
const int MAX_NAME_LEN = 127;
const int MAX_SUBJECT = 3;
const char *g_strSubjects[] =
{
"語文",
"數學",
"英語",
"非法"
};
typedef struct _Student
{
char szName[MAX_NAME_LEN + 1];
int nArryScore[MAX_SUBJECT];
}Student;
Student students[MAX_NUM];
static int read_line ( FILE *fp, char *line, int max_length )
{
int i;
char ch;
/* initialize index to string character */
i = 0;
/* read to end of line, filling in characters in string up to its
maximum length, and ignoring the rest, if any */
for(;;)
{
/* read next character */
ch = fgetc(fp);
/* check for end of file error */
if ( ch == EOF )
return -1;
/* check for end of line */
if ( ch == '\n' )
{
/* terminate string and return */
line[i] = '\0';
return 0;
}
/* fill character in string if it is not already full*/
if ( i < max_length )
line[i++] = ch;
}
/* the program should never reach here */
return -1;
}
void menu_add_student()
{
Student* pStudent = NULL;
int nCnt = 0;
int nPos = 0;
while (MAX_NUM > nCnt)
{
printf("第%d個同學的記錄:", nCnt + 1);
pStudent = &students[nCnt];
scanf("%s", pStudent->szName);
for (nPos = 0; nPos < MAX_SUBJECT; nPos++)
{
scanf("%d", &pStudent->nArryScore[nPos]);
}
nCnt++;
getchar();
}
}
void query_student(int n)
{
Student *pStudent = &students[n];
printf("%s ", pStudent->szName);
int nPos = 0;
for (nPos = 0; nPos < MAX_SUBJECT; nPos++)
{
printf("%d ", pStudent->nArryScore[nPos]);
}
printf("\n");
}
void menu_query_detail()
{
int n = 0;
scanf("%d", &n);
getchar();
int nPos = 0;
for (nPos = 0; nPos < MAX_SUBJECT; nPos++)
{
printf("%s ", g_strSubjects[nPos]);
}
printf("\n");
query_student(n - 1);
}
void menu_query_all()
{
int nPos = 0;
for (nPos = 0; nPos < MAX_SUBJECT; nPos++)
{
printf("%s ", g_strSubjects[nPos]);
}
printf("\n");
int n = 0;
for (n = 0; n < MAX_NUM; n++)
{
query_student(n);
}
}
void menu_subject_average()
{
Student* pStudent = NULL;
int n3Score[MAX_SUBJECT] = {0};
int nCnt = 0;
int nPos = 0;
while (MAX_NUM > nCnt)
{
pStudent = &students[nCnt];
for (nPos = 0; nPos < MAX_SUBJECT; nPos++)
{
if (n3Score[nPos] < pStudent->nArryScore[nPos])
{
n3Score[nPos] += pStudent->nArryScore[nPos];
}
}
nCnt++;
}
for (nPos = 0; nPos < MAX_SUBJECT; nPos++)
{
printf("%s 平均分(%.2f)\n", g_strSubjects[nPos], n3Score[nPos] / MAX_NUMS);
}
}
void menu_subject_max()
{
Student* pStudent = NULL;
int n3Cnt[MAX_SUBJECT] = {0};
int n3Score[MAX_SUBJECT] = {0};
int nCnt = 0;
int nPos = 0;
while (MAX_NUM > nCnt)
{
pStudent = &students[nCnt];
for (nPos = 0; nPos < MAX_SUBJECT; nPos++)
{
if (n3Score[nPos] < pStudent->nArryScore[nPos])
{
n3Score[nPos] = pStudent->nArryScore[nPos];
n3Cnt[nPos] = nCnt + 1;
}
}
nCnt++;
}
for (nPos = 0; nPos < MAX_SUBJECT; nPos++)
{
printf("%s 最高分(%d), 編號(%d)\n", g_strSubjects[nPos], n3Score[nPos], n3Cnt[nPos]);
}
}
/* codes for menu */
#define ADD_CODE 0
#define PRINT_CODE 1
#define DETAIL_CODE 2
#define SUB_MAX_CODE 3
#define SUB_AVE_CODE 4
#define EXIT_CODE 5
int main (void)
{
for(;;)
{
int choice, result;
char line[301];
// FILE *fp1=fopen("input2","r");
/* print menu to standard error */
fprintf ( stderr, "\nOptions:\n" );
fprintf ( stderr, "%d: 錄入成績\n", ADD_CODE );
fprintf ( stderr, "%d: 輸出全班學生的成績\n", PRINT_CODE );
fprintf ( stderr, "%d: 輸入序號，輸出對應同學三門課的成績\n", DETAIL_CODE );
fprintf ( stderr, "%d: 輸出每門課最高分以及相應同學的序號\n", SUB_MAX_CODE );
fprintf ( stderr, "%d: 輸出每門課的平均分\n", SUB_AVE_CODE );
fprintf ( stderr, "%d: 退出系統\n", EXIT_CODE );
fprintf ( stderr, "\nEnter option: " );
if ( read_line ( stdin, line, 300 ) != 0 ) continue;
// read_line (fp1 , line, 300 ) ;
//printf("\n-----------%s-----------\n",line);
result = sscanf ( line, "%d", &choice );
if ( result != 1 )
{
fprintf ( stderr, "corrupted menu choice\n" );
continue;
}
switch ( choice )
{
case ADD_CODE: /* add book to database */
menu_add_student();
break;
case PRINT_CODE: /* get book details from database */
menu_query_all();
break;
case DETAIL_CODE: /* delete book from database */
menu_query_detail();
break;
case SUB_MAX_CODE: /* print database contents to screen
(standard output) */
menu_subject_max();
break;
case SUB_AVE_CODE: /* print tree to screen (standard output) */
menu_subject_average();
break;
/* exit */
case EXIT_CODE:
break;
default:
fprintf ( stderr, "illegal choice %d\n", choice );
break;
}
/* check for exit menu choice */
if ( choice == EXIT_CODE )
break;
}
return 0;
}