我意识到有几个像这样的重复项,但是迄今为止他们都没有为我工作。 我想在Ubuntu上使用g ++编译C++非常简单的程序,但它给我的范围错误。'cout'不是'std'的成员并且'cout'未在此范围内声明
#include
using namespace std;
int main()
{
cout << "Hello world";
}
这给了我这个错误:
sudo g++ -v test.c
test.c: In function ‘int main()’:
test.c:7:3: error: ‘cout’ was not declared in this scope
我也试图定义范围,因为许多其他职位说,但也没有工作,但给了我一个不同的错误:
#include
int main()
{
std::cout << "Hello world";
}
给出错误:
test.c: In function ‘int main()’:
test.c:6:3: error: ‘cout’ is not a member of ‘std’
在线大多数建议都建议使用“命名空间标准”,“#包括”和“std :: cout”。 所以我尝试了所有3一起,仍然没有运气:(
#include
using namespace std;
int main()
{
std::cout << "Hello world";
}
给出了错误:
test.c: In function ‘int main()’:
test.c:7:3: error: ‘cout’ is not a member of ‘std’
我已经经历了几个网上论坛,但他们都不为工作我:(
这是一个更大的问题,因为其中一个我的Linux制作不起作用的一部分
顺便说一句,我使用g ++而不是gcc作为几个帖子搞砸了。
编辑1:
我改的.cpp,并没有sudo执行的名字。以下是详细输出:
[email protected]:~/Desktop/SIP/SIPp/sipp-3.3$ g++ -v test.cpp -o test
Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/4.7/lto-wrapper
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu/Linaro 4.7.2-2ubuntu1' --with-bugurl=file:///usr/share/doc/gcc-4.7/README.Bugs --enable-languages=c,c++,go,fortran,objc,obj-c++ --prefix=/usr --program-suffix=-4.7 --enable-shared --enable-linker-build-id --with-system-zlib --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --with-gxx-include-dir=/usr/include/c++/4.7 --libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-gnu-unique-object --enable-plugin --enable-objc-gc --disable-werror --with-arch-32=i686 --with-tune=generic --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 4.7.2 (Ubuntu/Linaro 4.7.2-2ubuntu1)
COLLECT_GCC_OPTIONS='-v' '-o' 'test' '-shared-libgcc' '-mtune=generic' '-march=x86-64'
/usr/lib/gcc/x86_64-linux-gnu/4.7/cc1plus -quiet -v -imultiarch x86_64-linux-gnu -D_GNU_SOURCE test.cpp -quiet -dumpbase test.cpp -mtune=generic -march=x86-64 -auxbase test -version -fstack-protector -o /tmp/cczzibvL.s
GNU C++ (Ubuntu/Linaro 4.7.2-2ubuntu1) version 4.7.2 (x86_64-linux-gnu)
compiled by GNU C version 4.7.2, GMP version 5.0.2, MPFR version 3.1.0-p3, MPC version 0.9
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
ignoring nonexistent directory "/usr/local/include/x86_64-linux-gnu"
ignoring nonexistent directory "/usr/lib/gcc/x86_64-linux-gnu/4.7/../../../../x86_64-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
/usr/include/c++/4.7
/usr/include/c++/4.7/x86_64-linux-gnu
/usr/include/c++/4.7/backward
/usr/lib/gcc/x86_64-linux-gnu/4.7/include
/usr/local/include
/usr/lib/gcc/x86_64-linux-gnu/4.7/include-fixed
/usr/include/x86_64-linux-gnu
/usr/include
End of search list.
GNU C++ (Ubuntu/Linaro 4.7.2-2ubuntu1) version 4.7.2 (x86_64-linux-gnu)
compiled by GNU C version 4.7.2, GMP version 5.0.2, MPFR version 3.1.0-p3, MPC version 0.9
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 521527ea42f0901bf839bcaad0cb13e6
test.cpp: In function ‘int main()’:
test.cpp:5:3: error: ‘cout’ is not a member of ‘std’
2013-03-12
Pranoy C
+7
你为什么需要'sudo'来运行g ++?文件扩展名应该是'.cpp'而不是'.c'? –
2013-03-12 11:12:25
+6
重命名您的源文件以'.cpp'结尾为'g ++'提供正确的线索。 –
2013-03-12 11:12:56
+3
不能重现... –
2013-03-12 11:13:49