C言語マスターのための5ステップ！switch-case文と複数条件の使い方

#include <stdio.h>

int main() {
    int number = 2;

    switch (number) {
        case 1:
            printf("number is 1.\n");
            break;
        case 2:
            printf("number is 2.\n");
            break;
        default:
            printf("number is not 1 or 2.\n");
    }

    return 0;
}

#include <stdio.h>

int main() {
    int number = 10;

    if (number > 5 && number < 15) {
        printf("number is between 5 and 15.\n");
    } else {
        printf("number is not between 5 and 15.\n");
    }

    return 0;
}

#include <stdio.h>

int main() {
    int number = 10;
    int category = 2;

    switch (category) {
        case 1:
            if (number > 5 && number < 15) {
                printf("Category 1 and number is between 5 and 15.\n");
            } else {
                printf("Category 1 but number is not between 5 and 15.\n");
            }
            break;
        case 2:
            if (number > 5 && number < 15) {
                printf("Category 2 and number is between 5 and 15.\n");
            } else {
                printf("Category 2 but number is not between 5 and 15.\n");
            }
            break;
        default:
            printf("Unknown category.\n");
    }

    return 0;
}

#include <stdio.h>

int main() {
    int number = 2;

    switch (number) {
        case 1:
        case 2:
            printf("number is 1 or 2.\n");
            break;
        default:
            printf("number is not 1 or 2.\n");
    }

    return 0;
}

#include <stdio.h>

int main() {
    int number = 10;

    if (number > 5 && number < 15 || number == 20) {
        printf("number is between 5 and 15, or number is 20.\n");
    } else {
        printf("number is not in the specified range.\n");
    }

    return 0;
}