相关疑难解决方法(0)

我在nuwen.net上使用minGW的mingw-w64(x64)分支.这是来自7.1版本的gcc:

gcc --version
gcc (GCC) 7.1.0

我正在编译这个程序:

#include <stdio.h>

int main(void)
{
    size_t a = 100;
    printf("a=%lu\n",a);
    printf("a=%llu\n",a);
    printf("a=%zu\n",a);
    printf("a=%I64u\n",a);
}

有警告和c11标准:

gcc -Wall -Wextra -Wpedantic -std=c11 test_size_t.c

我收到这些警告:

   test_size_t.c: In function 'main':
    test_size_t.c:6:14: warning: format '%lu' expects argument of type 'long unsigned int', but argument 2 has type 'size_t {aka long long unsigned int}' [-Wformat=]
      printf("a=%lu\n",a);
                ~~^
                %I64u
    test_size_t.c:6:14: warning: format '%lu' expects argument of type 'long unsigned int', but argument 2 has type 'size_t {aka long long unsigned …