type test

max_align_t.c

#include <stdio.h>
#include <stddef.h>

int main() {
        printf("align is %ld.\n", __alignof__(max_align_t));
        printf("count is %ld.\n", sizeof(max_align_t) / 8);  // 8 stands for f64
        return 0;
}

ptr.c

#include <stdio.h>

int main() {
        printf("pointer width is %ld.\n", sizeof(void*) * 8);
        return 0;
}

typtest.cxx

#include <iostream>
#include <limits>

using namespace std;

template <typename T> struct test_int {
        test_int(const char* name) {
                cout << name << ": ";
                cout << (numeric_limits<T>::is_signed ? "i" : "u");
                cout << sizeof(T) * 8 << "." << endl;
        }
};

template <typename T> struct test_float {
        test_float(const char* name) {
                cout << name << ": f" << sizeof(T) * 8 << "." << endl;
        }
};

int main() {
        test_int<char>{"c_char"};
        test_int<unsigned char>{"c_uchar"};
        test_int<short>{"c_short"};
        test_int<unsigned short>{"c_ushort"};
        test_int<int>{"c_int"};
        test_int<unsigned int>{"c_uint"};
        test_int<long>{"c_long"};
        test_int<unsigned long>{"c_ulong"};
        test_int<long long>{"c_longlong"};
        test_int<unsigned long long>{"c_ulonglong"};
        test_float<float>{"c_float"};
        test_float<double>{"c_double"};
        test_float<long double>{"c_longdouble"};
        return 0;
}