int main(void) {
    char str1[10] = "ABC";
    char str2[10] = "ABC";
    char *str3 = "ABC";
    if (strcmp(str1, str2) == 0) {
        puts("真");
    } else {
        puts("偽");
    }

    if (str3 == "ABC") {
        puts("str3 = 真");
    } else {
        puts("str3 = 偽");
    }
    return 0;
}