c数据类型问题，懂得朋友进来看看，谢谢

用dev-c++编译的
是c primer plus 的例题
程序如下：
#include <stdio.h>
#include <stdlib.h>

int main(void)
{
    unsigned int un = 3000000000; /* 32位int */
    short end = 200;
    long big = 65537;
    long long verybig = 12345678908426;
    printf ("un = %u and not %d\n",un, un);
    printf ("end = %hd and %d\n",end ,end);
    printf ("big = %ld and not %hd\n", big, big);
    printf ("verybig = %lld and not %d\n",verybig, verybig);
    system("PAUSE");
    return 0;
}
编译出警告：7 [Warning] this decimal constant is unsigned only in ISO C90
            10[Warning] integer constant is too large for "long" type

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up

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7 [Warning] this decimal constant is unsigned only in ISO C90
gcc有时候也有这个警告，加上 -std=c99 选项可以通过。 dev-c++没用过

10[Warning] integer constant is too large for "long" type
试试在常数后面加上LL  long long verybig = 12345678908426LL;

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是编译器的问题吧！vs2008报错误、警告数都为零，能正常运行。

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引用

7 [Warning] this decimal constant is unsigned only in ISO C90
gcc有时候也有这个警告