string

1.

#include <iostream>#include <string.h>#include <stdio.h>using namespace std;void main(){string test;char szBuffer[1024] = {0};char szBuffer02[1024] = {0};int a=1, b=2,c=3;sprintf(szBuffer,"%d,%d,%d",a,b,c );sprintf(szBuffer02,"%d,%d",a,b );test += szBuffer;test += ",";test += szBuffer02;cout<<szBuffer<<endl;cout<<szBuffer02<<endl;for(int i=0;i<strlen(test.c_str());i++){cout<<test[i];}getchar();}

2.

#include <iostream>#include <string.h>#include <stdio.h>using namespace std;void PutInt(string &src,int data){static bool once=false;char szBuffer[1024] = {0};sprintf(szBuffer,"%d",data );if(once)src += ",";src += szBuffer;once=true;} void main(){string test;for(int i=1;i<10;i++){PutInt(test,i);}for(int i=0;i<strlen(test.c_str());i++){cout<<test[i];}getchar();}

3.

#include <iostream>#include <sstream>#include <string>using namespace std;int main(){istringstream iss("12 34");int a, b;iss >> a >> b;//从字符串输入流iss中读取两个数cout << a << "，" << b << endl;string str;ostringstream oss(str);//输出到string str中oss << a << " " << b;cout << oss.str() << endl;  //取出输出缓冲区的getchar();return 0;}

4.replace

#include <iostream>#include <string.h>using namespace std;int main(){string result;string s = "AAAAAAAA";char ch = 'C';result = s.replace ( 1 , 3 , 4 , ch ); // s= "ACCCCAAAAfor (int i = 0;i<result.size();++i){cout<<result[i];}cout<<endl;system("pause");return 0;}

5.substr

#include <iostream>#include <string.h>using namespace std;int main(){string s, ss;s = "The rain in Spain falls mainly in the plain."; ss = s.substr(12, 5);  // Spain for(int i=0;i<ss.size();++i)cout<<ss[i];cout<<endl;ss = s.substr(12);                // Spain falls mainly in the plain.for(int i=0;i<ss.size();++i)cout<<ss[i];system("pause");return 0;}

6.判断字符是中文还是英文

#include <iostream>#include <string.h>using namespace std;int main(){unsigned char input[50] = "fdasfasffff中文";int flag = 0;for (int i = 0; i < 50; i++){if (input[i] > 0xa0 && input[i] != 0){if (flag == 1){cout << "chinese character" << endl;flag = 0;}else{flag++;}}else if (input[i] == 0){break;}else{cout << "english character" << endl;}}system("pause");return 0;}