C++primer习题3.14 vector<string>读写字符

#include <iostream> #include <iomanip> #include <fstream> #include <string> #include <iostream> #include <vector> using namespace std; void get_upper(string &s) {     for(size_t i = 0; i != s.size(); ++i)     {         s[i] = toupper(s[i]);     } } int main() {     ifstream infile("E:\\test.txt");     if (!infile)     {         cerr << "error" << endl;     }     vector<string> svec;     string s;     while (infile)     {         infile >> s;         svec.push_back(s);     }     for(size_t i = 0; i != svec.size(); ++i)     {         get_upper(svec[i]);         cout << svec[i] << " ";         if ((i+1)%8==0)         {             cout << endl;         }     } }

使用迭代器：

#include <iostream> #include <iomanip> #include <fstream> #include <string> #include <iostream> #include <vector> using namespace std; void get_upper(string &s) {     for(size_t i = 0; i != s.size(); ++i)     {         s[i] = toupper(s[i]);     } } int main() {     ifstream infile("E:\\test.txt");     if (!infile)     {         cerr << "error" << endl;     }     vector<string> svec;     string s;     while (infile)     {         infile >> s;         svec.push_back(s);     }     int i = 1;     for(vector<string>::iterator iter = svec.begin(); iter != svec.end(); ++iter)     {         get_upper(*iter);         cout << *iter << " ";         if (i++%8==0)         {             cout << endl;         }     } }

FROM:  http://www.cnblogs.com/xiangshancuizhu/archive/2011/06/08/2075758.html