student-registration-management-system/part3.c

#include <stdio.h>
#include <stdlib.h>

void inputStudentsInfo();
void outputStudentsInfo();
void orderStudentsInfo();

int main() {
    char input;
  
    while (1) {
        printf("                              1.Input\n");
        printf("                              2.Output\n");
        printf("                              3.Order\n");
        printf("                              4.Quit\n");
        printf("Please enter your choice: ");
        scanf(" %c", &input);
      
        switch (input) {
            case 'i':
                inputStudentsInfo();
                break;
            case 'o':
                outputStudentsInfo();
                break;
            case 'm':
                orderStudentsInfo();
                break;
            case 'q':
                printf("You are about to Quit\n");
                exit(0);
            default:
                printf("Wrong input\n");
                break;
        }
    }
  
    return 0;
}

void inputStudentsInfo() {
    int studentID[3];
    float mathScore[3], physicsScore[3], englishScore[3], totalScore[3];
  
    printf("Please input info of the three students:\n");
    for (int i = 0; i < 3; i++) {
        printf("Student %d: ", i+1);
        scanf("%d%f%f%f", &studentID[i], &mathScore[i], &physicsScore[i], &englishScore[i]);
        totalScore[i] = mathScore[i] + physicsScore[i] + englishScore[i];
    }
  
    printf("\nSorted students info:\n");
    for (int i = 0; i < 3; i++) {
        printf("学号%d,总成绩%.1f,平均成绩%.1f\n", studentID[i], totalScore[i], totalScore[i] / 3);
    }
}

void outputStudentsInfo() {
    printf("You are trying to Make things ordered\n");
}

void orderStudentsInfo() {
    printf("Please enter your choice: ");
    char input;
    scanf(" %c", &input);
  
    switch(input) {
        case 'q':
        case 'Q':
            printf("You are about to Quit\n");
            exit(0);
        default:
            printf("Wrong input\n");
            break;
    }
}