可以這樣寫：
#include <stdio.h>
#define NumberOfSubjects?3
#define NumberOfStudents 10
#define PassingScore 40
typedef enum {
false,
true,
}
bool;
typedef enum {
M,
F,
}
Gender;
typedef enum {
Literature,
History,
Programming,
}
SubjectIndex;
typedef struct {
unsigned ID;
char?*name;
Gendergender;
unsigned scores[ NumberOfSubjects ];
}
Student;
Student students[ NumberOfStudents ] = {
{ 1000, "Haven",F, {?62, 90, 50 } },
{ 1001, "Wendy",F, {?68, 81, 25 } },
{ 1002, "Tedd",?M, {?69, 76, 58 } },
{ 1003, "Elyssa",F, {?79, 83, 15 } },
{ 1004, "Halie",F, { 100, 78, 43 } },
{ 1005, "Quinn",F, {?55, 91, 41 } },
{ 1006, "Heidi",F, {?87, 89, 26 } },
{ 1007, "Rebecca",?F, {?93, 75, 44 } },
{ 1008, "Pierce",M, {?29, 32, 97 } },
{ 1009, "Makenna",?F, {?53, 40, 57 } },
};
void printHeader( ) {
puts( "-------------------------------------------------------------------------------\n"
"|?|?|?|Scores?|\n" "|?ID?|Name|?Gender?|------------------------------------------------|\n" "|?|?|?| Literature | History | Programming | (Average) |\n" "-------------------------------------------------------------------------------" );}
void printStudent( Student stu ) {
unsigned lit = stu.scores[ Literature?],
his = stu.scores[ History?], pro = stu.scores[ Programming ];float avg = ( float ) ( lit + his + pro ) / NumberOfSubjects;
printf( "?%u%-10s %3s %12u %11u %11u %13.2f\n",
stu.ID, stu.name, stu.gender == M ? "M" : "F", lit, his, pro, avg );
}
Student topScorer( SubjectIndex sji ) {
Student top = students[ 0 ];
int i = 1;
for ( ; i < NumberOfStudents; i++ )
if ( students[ i ].scores[ sji ] > top.scores[ sji ] )
top = students[ i ];
return top;
}
bool failingAtLeastOneSubject( Student stu ) {
int i = 0;
for ( ; i < NumberOfSubjects; i++ )
if ( stu.scores[ i ] < PassingScore )
return true;
return false;
}
void main( ) {
int i;
puts( "Format of displayed student data:\n" );
printHeader( );
puts( "\n>>> Top scorers of Literature, History and Programming (in that order):\n" );
for ( i = 0; i < NumberOfSubjects; i++ )
printStudent( topScorer( i ) );
puts( "\n\n>>> Failing at least one subject:\n" );
for ( i = 0; i < 10; i++ )
if ( failingAtLeastOneSubject( students[ i ] ) )
printStudent( students[ i ] );
}