#include <stdio.h>
#include <string.h>

#define MAX_STUDENTS 3
#define MAX_NAME_LEN 50

struct Student {
    char name[MAX_NAME_LEN];
    float marks[3];
};

void calculate(const struct Student* s, float* total, float* average) {
    *total = s->marks[0] + s->marks[1] + s->marks[2];
    *average = *total / 3.0f;
}

void getMention(float avg, char* mention, size_t mSize, char* result, size_t rSize) {
    if (avg >= 17.0f) {
        strcpy_s(mention, mSize, "Excellent");
        strcpy_s(result, rSize, "PASS");
    }
    else if (avg >= 14.0f) {
        strcpy_s(mention, mSize, "Very Good");
        strcpy_s(result, rSize, "PASS");
    }
    else if (avg >= 12.0f) {
        strcpy_s(mention, mSize, "Good");
        strcpy_s(result, rSize, "PASS");
    }
    else if (avg >= 10.0f) {
        strcpy_s(mention, mSize, "Pass");
        strcpy_s(result, rSize, "PASS");
    }
    else {
        strcpy_s(mention, mSize, "Fail");
        strcpy_s(result, rSize, "FAIL");
    }
}

void displayRow(const struct Student* s, float total, float avg, const char* result, const char* mention) {
    printf("| %-10s | %5.2f | %5.2f | %5.2f | %6.2f | %5.2f | %-6s | %-10s |\n",
        s->name, s->marks[0], s->marks[1], s->marks[2], total, avg, result, mention);
}

void displayAll(struct Student s[], int index, int size) {
    if (index == size) return;

    float total, avg;
    char mention[20], result[10];

    calculate(&s[index], &total, &avg);
    getMention(avg, mention, sizeof(mention), result, sizeof(result));
    displayRow(&s[index], total, avg, result, mention);

    displayAll(s, index + 1, size);
}

int main(void) {
    struct Student students[MAX_STUDENTS];

    for (int i = 0; i < MAX_STUDENTS; i++) {
        printf("Enter name for student %d: ", i + 1);
        // scanf_s needs buffer size as unsigned int
        scanf_s("%49s", students[i].name, (unsigned int)MAX_NAME_LEN);

        for (int j = 0; j < 3; j++) {
            printf("Enter mark %d (out of 20): ", j + 1);
            scanf_s("%f", &students[i].marks[j]);
        }
        printf("\n");
    }

    printf("\n| %-10s | %-5s | %-5s | %-5s | %-6s | %-5s | %-6s | %-10s |\n",
        "Name", "M1", "M2", "M3", "Total", "Avg", "Result", "Mention");
    printf("|------------|-------|-------|-------|--------|-------|--------|------------|\n");

    displayAll(students, 0, MAX_STUDENTS);

    printf("\nPress Enter to exit...");
    getchar(); // consume trailing newline
    getchar(); // wait for user
    return 0;
}