Eto 干支

#include <stdio.h>

typedef struct profile {
    char idnumber[8]; /*学籍番号*/
    int age; /*年齢*/
    int year; /*生年月日*/
    int month;
    int day;
    int num;
    int height; /*身長*/
    int weight; /*体重*/
    double bmi; /*BMI*/
} profile_t;

void print_profile(struct profile x);
profile_t input_profile(void);
char *eto(int year);

int main(void) {
    profile_t data;

    data = input_profile();
    print_profile(data);

    getchar();
    return 0;
}

void print_profile(profile_t x) {
    printf("%10s:%3d,%3d/%d/%d,", x.idnumber, x.age,x.year, x.month, x.day);
    printf("%s,", eto(x.year));
    printf("%3d,%3d,%.1f\n", x.height, x.weight, x.bmi);
}

profile_t input_profile(void) {
    struct profile x;

    printf("学籍番号：");
    scanf("%7s",x.idnumber);
    printf("年齢：");
    scanf("%d",&x.age);
    printf("生年月日\n");
    printf("年(西暦)：");
    scanf("%d",&x.year);
    printf("月：");
    scanf("%d",&x.month);
    printf("日：");
    scanf("%d",&x.day);
    printf("身長：");
    scanf("%d",&x.height);
    printf("体重：");
    scanf("%d",&x.weight);

    x.bmi = (double)(100 * x.weight) / (x.height * x.height) * 100;

    getchar();
    return x;
}

char* eto_c[] = { "子", "丑", "寅", "卯", "辰", "巳", "午", "未", "申",
    "酉", "戌", "亥" };

char *eto(int year) {
    return eto_c[(year - 1900) % 12];
}