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C++导入导出CSV文件
(2012-06-14 15:25:10)
标签：
it |
分类： C/Cpp |
#include
<iostream>
#include <fstream>
#include <string>
#include <vector>
using namespace std;
void csvline_populate(vector<string> &record, const string& line, char delimiter);
int main(int argc, char *argv[])
{
vector<string> row;
string line;
ifstream in("input.csv");
if (in.fail())
{
cout <<
"File not found" <<endl;
return
0; }
while(getline(in, line) &&
in.good()
)
{
csvline_populate(row, line, ',');
for(int i=0,
leng=row.size();
i<leng;
i++)
cout <<
row[i] <<
"\t";
cout
<<
endl;
}
in.close();
return 0;
}
void csvline_populate(vector<string> &record, const string& line, char delimiter)
{
int linepos=0;
int inquotes=false;
char c;
int i;
int linemax=line.length();
string curstring;
record.clear();
while(line[linepos]!=0
&& linepos
<
linemax)
{
c =
line[linepos];
if (!inquotes &&
curstring.length()==0
&&
c=='"')
{
//beginquotechar
inquotes=true;
}
else if (inquotes &&
c=='"')
{
//quotechar
if
( (linepos+1 <linemax) &&
(line[linepos+1]=='"')
)
{
//encountered 2 double quotes
in a row (resolves to 1 double quote)
curstring.push_back(c);
linepos++;
}
else
{
//endquotechar
inquotes=false;
}
}
else if (!inquotes &&
c==delimiter)
{
//end of
field
record.push_back( curstring );
curstring="";
}
else if (!inquotes &&
(c=='\r'
|| c=='\n')
)
{
record.push_back( curstring );
return;
#include <fstream>
#include <string>
#include <vector>
using namespace std;
void csvline_populate(vector<string> &record, const string& line, char delimiter);
int main(int argc, char *argv[])
{
}
void csvline_populate(vector<string> &record, const string& line, char delimiter)
{