[問題] 有關函式指標

看板C_and_CPP (C/C++)作者kenboy99999 (Poppin~蛆~)時間16年前 (2010/03/21 22:35)推噓2(2推 0噓 11→)

留言13則, 5人參與討論串1/1

( *[1m *[m 為色碼，可以按 Ctrl+V 預覽會顯示的顏色 ) ( 未必需要依照此格式，文章條理清楚即可 ) 遇到的問題： (題意請描述清楚) 以下為程式碼 #include<stdio.h> #include<stdlib.h> #define STUDENT 3 #define EXAMS 4 void minimum(const int grade[][EXAMS], int pupils, int tests); void maximum(const int grade[][EXAMS], int pupils, int tests); void average(const int setOfGrades[], int tests); void printArray(const int grade[][EXAMS], int pupils, int tests); int main() { int student; const int studentGrades[STUDENT][EXAMS]={{77,68,86,73},{96,87,89,78},{70,90,86,81}}; void (*processGrades[4])(int)={minimum,maximum,average,printArray};<<這行有錯，不懂要怎麼改才可以 int choice; printf(" Enter a choice :"); printf("\n 0 Print the array of grades\n"); printf(" 1 Find the minimum grade \n"); printf(" 2 Find the maximum grades\n"); printf(" 3 Print the average on all test for each student\n"); printf(" 4 End program\n"); scanf("%d",&choice); system("pause"); printf("Enter:\n"); printArray(studentGrades, STUDENT, EXAMS); printf("\n\nLowest grade: %d\nHighest grade: %d\n", minimum(studentGrades, STUDENT, EXAMS), maximum(studentGrades, STUDENT, EXAMS)); for(student = 0; student<STUDENT; student++){ printf("The average grade for student %d is %.2f\n", student, average(studentGrades[student],EXAMS)); } system("pause"); return 0; } void minimum(const int grade[][EXAMS], int pupils, int tests) { int i; int j; int lowGrade = 100; for(i=0; i<pupils; i++){ for(j=0; j<tests; j++){ if(grade[i][j]<lowGrade){ lowGrade = grade[i][j]; } } } } void maximum(const int grade[][EXAMS], int pupils, int tests) { int i; int j; int highGrade = 0; for(i=0; i<pupils; i++){ for(j=0; j<tests; j++){ if(grade[i][j]>highGrade){ highGrade = grade[i][j]; } } } } void average(const int setOfGrades[], int tests) { int i; int total = 0; for(i=0; i<tests; i++){ total += setOfGrades[i]; } } void printArray(const int grade[][EXAMS], int pupils, int tests) { int i; int j; printf(" [0] [1] [2] [3]"); for(i=0; i<pupils; i++){ printf("\nstudentGrades[%d]", i); for(j=0; j<tests; j++){ printf("%-5d", grade[i][j]); } } } 希望得到的正確結果：程式跑出來的錯誤結果：開發平台： (例: VC++ or gcc/g++ or Dev-C++, Windows or Linux) 有問題的code： (請善用置底文標色功能) 補充說明： -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 114.42.163.225