3 < 2 < 1 is true ?

main.cpp

#include <iostream>

int main() {
    printf("3 < 2 : %d\n", 3 < 2);
    printf("2 < 1 : %d\n", 2 < 1);
    printf("3 < 2 < 1 : %d\n", 3 < 2 < 1);

    printf("\n");

    printf("3 < 2 : ");
    if (3 < 2) {
        printf("true\n");
    } else {
        printf("false\n");
    }

    printf("2 < 1 : ");
    if (2 < 1) {
        printf("true\n");
    } else {
        printf("false\n");
    }

    printf("3 < 2 < 1 : ");
    if (3 < 2 < 1) {
        printf("true\n");
    } else {
        printf("false\n");
    }

    printf("\n");

    bool r1 = 3 < 2;
    bool r2 = 2 < 1;
    bool r3 = 3 < 2 < 1;

    printf("3 < 2 : %d\n", r1);
    printf("2 < 1 : %d\n", r2);
    printf("3 < 2 < 1 : %d\n", r3);

    printf("\n");

    printf("pointer of 3 < 2 : %p\n", 3 < 2);
    printf("pointer of 2 < 1 : %p\n", 2 < 1);
    printf("pointer of 3 < 2 < 1 : %p\n", 3 < 2 < 1);

    return 0;
}