我正在尝试实现一个简单的 C++ 程序,该程序接受一个带有标点符号的输入字符串并返回一个删除这些标点符号的输出字符串。该程序是
#include<iostream>
#include<cctype>
using namespace std;
int main()
{
int index=0;
string sequence1,sequence2;
cout<<"enter the sequence"<<endl;
getline(cin,sequence1);
for(index=0;index<20;++index)
if(!ispunct(sequence1[index]))
sequence2[index]=sequence1[index];
cout<<sequence2<<endl;
return 0;
}
它给了我一个错误说ld returned 1 exit status
。总错误是
progprac: In function `_start':
(.text+0x0): multiple definition of `_start'
/usr/lib/gcc/x86_64-linux-gnu/4.6/../../../x86_64-linux-gnu/crt1.o:(.text+0x0): first defined here
progprac: In function `_fini':
(.fini+0x0): multiple definition of `_fini'
/usr/lib/gcc/x86_64-linux-gnu/4.6/../../../x86_64-linux-gnu/crti.o:(.fini+0x0): first defined here
progprac:(.rodata+0x0): multiple definition of `_IO_stdin_used'
/usr/lib/gcc/x86_64-linux-gnu/4.6/../../../x86_64-linux-gnu/crt1.o:(.rodata.cst4+0x0): first defined here
progprac: In function `__data_start':
(.data+0x0): multiple definition of `__data_start'
/usr/lib/gcc/x86_64-linux-gnu/4.6/../../../x86_64-linux-gnu/crt1.o:(.data+0x0): first defined here
progprac: In function `__data_start':
(.data+0x8): multiple definition of `__dso_handle'
/usr/lib/gcc/x86_64-linux-gnu/4.6/crtbegin.o:(.data+0x0): first defined here
progprac: In function `_init':
(.init+0x0): multiple definition of `_init'
/usr/lib/gcc/x86_64-linux-gnu/4.6/../../../x86_64-linux-gnu/crti.o:(.init+0x0): first defined here
/tmp/ccpOfw2A.o: In function `main':
progprac.cc:(.text+0x0): multiple definition of `main'
progprac:(.text+0xe4): first defined here
/usr/lib/gcc/x86_64-linux-gnu/4.6/crtend.o:(.dtors+0x0): multiple definition of `__DTOR_END__'
progprac:(.dtors+0x8): first defined here
/usr/bin/ld: error in progprac(.eh_frame); no .eh_frame_hdr table will be created.
collect2: ld returned 1 exit status
我在网上查了一下,这是一个链接器错误,你声明了一个函数而不是定义它。但我没有犯过这样的错误。错误是什么?