#include<iostream>
#include<stdio.h>
using namespace std;
int main()
{
    int index=0;
    cout<<"Hello world!" << endl;
    char str2[300]={};
    char str1[30] = "http://c.biancheng.net";
    for(int i=0;i<30;i++)
           cout<<str1[i];
    char s0='c';
    char s1[3];
    s1[0]='a';
    s1[1]='s';
    for(int i=0;i<30;i++){
           if (str1[i]!=s0)
                 str2[index++]=str1[i];
           else{
               for(int j=0;j<2;j++)
                     str2[index++]=s1[j];
           }
                 }
    for(int i=0;i<300;i++)
          if (str2[i]!=0)
           cout<<str2[i];
    cout<<endl;
}
 

執行結果： 

Hello world!
http://c.biancheng.net

http://as.bianasheng.net