sstream
sstream用法
1 #include<iostream> 2 #include<sstream> 3 #include<string> 4 using namespace std; 5 6 int main(){ 7 /* istringstream 用法 */ 8 istringstream instr; 9 string str = "westerDB 1024"; 10 instr.str(str); //只能存string值 11 //instr.str(to_string(123)); 12 //cout<<instr.str()<<instr.str(); //并不会影响instr的内部内容 13 14 string hdisk; 15 instr>>hdisk; 16 //getline(instr, hdisk); 17 int cap; 18 instr>>cap; 19 20 //cout<<instr.str(); 21 cout<<hdisk<<endl<<cap; 22 return 0; 23 } 24 25 /* ostringstream用法 */ 26 int testOutStr(){ 27 ostringstream outstr; 28 /*istringstream instr; 29 string str = "westerDB 1024"; 30 instr.str(str);*/ 31 32 string hdisk; 33 cout<<"what's the name of your hard disk?"; 34 getline(cin, hdisk); 35 36 int cap; 37 cout<<"what's its capacity in GB?"; 38 cin>>cap; 39 40 outstr<< "The hard disk "<<hdisk<<" has a capacity of " 41 <<cap<<" gigabytes.\n"; 42 43 string result = outstr.str(); 44 cout<<result; 45 return 0; 46 }