#include <stdio.h> int main() { unsigned long long int num = 285212672; //FYI: fits in 29 bits int normalInt = 5; printf("My number is %d bytes wide and its value is %ul. A normal number is %d.\n", sizeof(num), num, normalInt); return 0; }
输出: windows
My number is 8 bytes wide and its value is 285212672l. A normal number is 0.
我认为这种意外的结果是因为打印unsigned long long int
。 你如何printf()
一个unsigned long long int
? api
使用VS2005将其编译为x64: ide
%llu运做良好。 spa
对于使用MSVS的很长一段时间(或__int64),应该使用%I64d: code
__int64 a; time_t b; ... fprintf(outFile,"%I64d,%I64d\n",a,b); //I is capital i
将ll(el-el)long-long修饰符与u(无符号)转换一块儿使用。 (在Windows,GNU中运行)。 orm
printf("%llu", 285212672);
非标准的东西老是很奇怪:) 编译器
对于GNU下的long long部分,它是L
, ll
或q
it
和windows下我相信这是ll
只 io
好吧,一种方法是使用VS2008将其编译为x64 编译
这将按您指望的那样运行:
int normalInt = 5; unsigned long long int num=285212672; printf( "My number is %d bytes wide and its value is %ul. A normal number is %d \n", sizeof(num), num, normalInt);
对于32位代码,咱们须要使用正确的__int64格式说明符%I64u。 就这样。
int normalInt = 5; unsigned __int64 num=285212672; printf( "My number is %d bytes wide and its value is %I64u. A normal number is %d", sizeof(num), num, normalInt);
此代码适用于32位和64位VS编译器。