string 和 char結合使用樣本

#include<iostream>#include<fstream>#include<string>using namespace std;int main(){ ifstream infile("data.txt"); ofstream outfile("result.txt"); if(!infile) {  cout<<"data.txt open failed.\n";  return 1; } if(!outfile) {  cout<<"result.txt open failed";  return 1; } string s;//定義一個string對象 char ss[80];//定義一個char數組，因為getline函數的參數是一個數組指標 while(infile.getline(ss, 80)) {  if(ss[0]=='#')break;  s=ss;//直接將char數組賦值給string對象  for(int i=0; i<s.size();i++)  {   if(s[i]==' ')outfile<<"%20";   else if(s[i]=='!')outfile<<"%21";   else if(s[i]=='$')outfile<<"%24";   else if(s[i]=='%')outfile<<"%25";   else if(s[i]=='(')outfile<<"%28";   else if(s[i]==')')outfile<<"%29";   else if(s[i]=='*')outfile<<"%2a";   else outfile<<s[i];  }  outfile<<'\n'; } return 0;}