关于srand(time(0));的错误 - 编程论坛

#2

rjsp2018-07-17 14:40

贴出代码，贴出编译器给的错误信息，此外无它

程序代码：

#include <cstdlib>
#include <ctime>

int main( void )
{
srand( static_cast<unsigned>(time(nullptr)) );
}

#3

cstdio2018-07-18 10:17

60    11    C:\Program Files (x86)\Dev-Cpp\MinGW64\lib\gcc\x86_64-w64-mingw32\4.9.2\include\c++\ctime    [Error] '::tm' has not been declared
62    11    C:\Program Files (x86)\Dev-Cpp\MinGW64\lib\gcc\x86_64-w64-mingw32\4.9.2\include\c++\ctime    [Error] '::clock' has not been declared
63    11    C:\Program Files (x86)\Dev-Cpp\MinGW64\lib\gcc\x86_64-w64-mingw32\4.9.2\include\c++\ctime    [Error] '::difftime' has not been declared
64    11    C:\Program Files (x86)\Dev-Cpp\MinGW64\lib\gcc\x86_64-w64-mingw32\4.9.2\include\c++\ctime    [Error] '::mktime' has not been declared
65    11    C:\Program Files (x86)\Dev-Cpp\MinGW64\lib\gcc\x86_64-w64-mingw32\4.9.2\include\c++\ctime    [Error] '::time' has not been declared
66    11    C:\Program Files (x86)\Dev-Cpp\MinGW64\lib\gcc\x86_64-w64-mingw32\4.9.2\include\c++\ctime    [Error] '::asctime' has not been declared
67    11    C:\Program Files (x86)\Dev-Cpp\MinGW64\lib\gcc\x86_64-w64-mingw32\4.9.2\include\c++\ctime    [Error] '::ctime' has not been declared
68    11    C:\Program Files (x86)\Dev-Cpp\MinGW64\lib\gcc\x86_64-w64-mingw32\4.9.2\include\c++\ctime    [Error] '::gmtime' has not been declared
69    11    C:\Program Files (x86)\Dev-Cpp\MinGW64\lib\gcc\x86_64-w64-mingw32\4.9.2\include\c++\ctime    [Error] '::localtime' has not been declared
70    11    C:\Program Files (x86)\Dev-Cpp\MinGW64\lib\gcc\x86_64-w64-mingw32\4.9.2\include\c++\ctime    [Error] '::strftime' has not been declared
6    39    C:\1.cpp    [Error] 'nullptr' was not declared in this scope
6    46    C:\1.cpp    [Error] 'time' was not declared in this scope

#4

cstdio2018-07-18 10:17

dev_c++ 32bit release

#5

cstdio2018-07-18 10:18

重装好多遍都没有用
包含ctime的文件都会编译错误

#6

rjsp2018-07-18 12:56

回复 3楼 cstdio

贴代码，贴代码，贴代码！
如果你用的是2楼给出的代码，你要明确、明确、明确地说出来，不要无聊地打哑谜。

先说“[Error] 'nullptr' was not declared in this scope”吧，你用的编译太老旧了，那就将 nullptr 改为 NULL 吧。
其它的错误，看看你工程目录下是不是有个 time.h 文件，导致编译器错误地include了你这个time.h，而不是系统的time.h

#7

cstdio2018-07-18 13:42

我用的就是2楼的代码
没有time.h文件啊

#8

rjsp2018-07-18 14:35

回复 7楼 cstdio

那你换个目录重建工程试试