编程出现run_time error
#include <map>
#include <vector>
#include <iostream>
#include <fstream>
#include <string>
#include <stdexcept>
#include <sstream>
using std::map; using std::string; using std::vector;
using std::ifstream; using std::cout; using std::endl;
using std::getline; using std::make_pair;
using std::runtime_error; using std::istringstream;
ifstream& open_file(ifstream &in, const string &file)
{
in.close(); // close in case it was already open
in.clear(); // clear any existing errors
// if the open fails, the stream will be in an invalid state
in.open(file.c_str()); // open the file we were given
return in; // condition state is good if open succeeded
}
int main(int argc, char **argv)
{
// map to hold the word transformation pairs:
// key is the word to look for in the input; value is word to use in the output
map<string, string> trans_map;
string key, value;
if (argc != 3)
throw runtime_error("wrong number of arguments");
// open transformation file and check that open succeeded
ifstream map_file;
if (!open_file(map_file, argv[1]))
throw runtime_error("no transformation file");
// read the transformation map and build the map
while (map_file >> key >> value)
trans_map.insert(make_pair(key, value));
{
// ok: let's display it
map<string, string>::iterator map_it = trans_map.begin();
//cout << "Here is our transformation map: \n\n";
while (map_it != trans_map.end()) {
cout << "key: " << map_it->first;
if (map_it->first.size() == 1)
cout << " ";
if (map_it->first.size() == 3)
cout << " ";
else if (map_it->first.size() == 4)
cout << " ";
else if (map_it->first.size() == 5)
cout << " ";
cout << "value: " << map_it->second << endl;
++map_it;
}
cout << "\n\n";
{ // this block just produces the vector so that we can print it
// for the book
cout << "Here is our original string input:\n\n";
// read some text to transform
ifstream input;
if (!open_file(input, argv[2]))
throw runtime_error("no input file");
string word;
while (getline(input, word))
cout << word << endl;
cout << "\n\n\n";
input.close(); input.clear();
}
}
// ok, now we're ready to do the transformations
// open the input file and check that the open succeeded
ifstream input;
if (!open_file(input, argv[2]))
throw runtime_error("no input file");
string line; // hold each line from the input
// read the text to transform it a line at a time
while (getline(input, line)) {
istringstream stream(line); // read the line a word at a time
string word;
bool firstword = true; // controls whether a space is printed
while (stream >> word) {
// ok: the actual mapwork, this part is the heart of the program
map<string, string>::const_iterator map_it =
trans_map.find(word);
// if this word is in the transformation map
if (map_it != trans_map.end())
// replace it by the transformation value in the map
word = map_it->second;
if (firstword)
firstword = false;
else
cout << " "; // print space between words
cout << word;
}
cout << endl; // done with this line of input
}
return 0;
}
“slc.exe”: 已加载“C:\Users\Administrator\Documents\Visual Studio 2010\Projects\slc\Debug\slc.exe”，已加载符号。
“slc.exe”: 已加载“C:\Windows\System32\ntdll.dll”，Cannot find or open the PDB file
“slc.exe”: 已加载“C:\Windows\System32\kernel32.dll”，Cannot find or open the PDB file
“slc.exe”: 已加载“C:\Windows\System32\KernelBase.dll”，Cannot find or open the PDB file
“slc.exe”: 已加载“C:\Windows\System32\msvcp100d.dll”，已加载符号。
“slc.exe”: 已加载“C:\Windows\System32\msvcr100d.dll”，已加载符号。
slc.exe 中的 0x75a8c6e3 处最可能的异常: Microsoft C++ 异常: 内存位置 0x0028f130 处的 std::runtime_error。
slc.exe 中的 0x75a8c6e3 处有未经处理的异常: Microsoft C++ 异常: 内存位置 0x0028f130 处的 std::runtime_error。
程序“[2336] slc.exe: 本机”已退出，返回值为 -529697949 (0xe06d7363)。
求编程高手相助。。。。。。
编程
[解决办法]
运行时传参数了吗？
if (argc != 3)
throw runtime_error("wrong number of arguments");
