Exer17_38.cpp

// Warning: this is for verification. It cannot work properly.
// This program uses data file ./data/paragraph.
#include <cstddef>
#include <cstring>
#include <iostream>
#include <fstream>
using std::size_t;
using std::cout;
using std::endl;
using std::ifstream;
int main(int argc, char* argv[])
{
    if(argc != 2)
        return -1;
    ifstream is(argv[1]);
    char sink[80] = {'\0'};
    size_t size = 80;
    char delim = ' ';
    while(is.getline(sink, size, delim)) {
        size_t cnt = is.gcount();
        cout.write(sink, cnt);
        memset(sink, '\0', size);
    }
    return 0;
}
// Note: once is.getline reads (size - 1) characters, it seems that the state of
// the stream is not good. Empty line is not read. But we reset sink every time
// after finish using it, so the empty line could be output normally.