我在试着使用C做U81502
,可是当复制粘贴代码并加上return a+b;
之后,出现了如下错误:
SPJ compilation failed:
/tmp/tmplcv21wp8/src:1:8: 错误:expected identifier or ‘(’ before string constant
extern "C" int plus(int a, int b) {
^~~
(链接:https://www.luogu.com.cn/record/35045472)
当将extern "C"
删除后,SPJ爆出如下错误:
No valid executable file was produced by the compiler
/usr/bin/ld: /tmp/tmplrm438bx/lib.o: in function `main':
src:(.text.startup+0x7): undefined reference to `std::cin'
/usr/bin/ld: src:(.text.startup+0x11): undefined reference to `std::istream::operator>>(int&)'
/usr/bin/ld: src:(.text.startup+0x1e): undefined reference to `std::istream::operator>>(int&)'
/usr/bin/ld: src:(.text.startup+0x32): undefined reference to `std::cout'
/usr/bin/ld: src:(.text.startup+0x39): undefined reference to `std::ostream::operator<<(int)'
/usr/bin/ld: src:(.text.startup+0x41): undefined reference to `std::basic_ostream<char, std::char_traits<char> >& std::endl<char, std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&)'
/usr/bin/ld: /tmp/tmplrm438bx/lib.o: in function `_GLOBAL__sub_I_main':
src:(.text.startup+0x5c): undefined reference to `std::ios_base::Init::Init()'
/usr/bin/ld: src:(.text.startup+0x63): undefined reference to `std::ios_base::Init::~Init()'
collect2: 错误:ld 返回 1
(网址:https://www.luogu.com.cn/record/35045743)
此错误似乎是在评测C的时候使用了C++代码
我在仔细查看题面之后发现没有要求必须使用C++,请问这是站务在其他地方已经说了还是真的没有?
如果没有的话,请问可以修改之使其可以使用C通过吗?谢谢!