Search and replace strings

Search and replace strings

Search for the target string in the string and replace it with the specified string. The number of replacement times is returned. The interface is

Int find_str_replace (char * & str, const char * find_str, const char * replace_str)

Replace all find_str in str with replace_str. Do not use STL. The c implementation code is as follows:

# Include
 
  
# Include
  
   
# Include
   
    
// Search for the position int find (const char * str, const char * sub_str, int fromwhere) Where str appears for the first time from fromwhere {int len = strlen (str ); int len_f = strlen (sub_str); for (int I = fromwhere; I
    
     
= Len_f; I ++) {int k = I; int j = 0; while (j
     
      
If c ++ and STL are used, the code is extremely simple:
      

      

      
#include
       
        #include
        
         using namespace std;int find_str_replace(string &str,string find_str,string replace_str){int num=0;int len_f=find_str.length();int len_r=replace_str.length();int pos=str.find(find_str,0);while(pos!=string::npos){  str.replace(str.begin()+pos,str.begin()+pos+len_f,replace_str);  pos=pos+len_r;  pos=str.find(find_str,pos);  num++;}return num;}int main(){string a="123456783450987634243453";string b="345";string c="ABCD";int num=find_str_replace(a,b,c);printf("%s\n",a.c_str());printf("%d",num);return 0;}