Remove specified characters from a string

Problem

Remove specified characters from a string

Solution

#include <iostream>

using namespace std;

/**************************************************

* str -- string

* dstr -- a set of characters to remove from string

**************************************************/

char* del_ch_in_str(char *str, char *dstr)

{

if(str == NULL || dstr == NULL){

return str;

}

char *p1 = str;

char *p2 = dstr;

while(*p1++ != '\0');

p1--;

while(p1 >= str){

p2 = dstr;

while(*p2 != '\0'){

if(*p2 == *p1){

char *p3 = p1;

while(*p3 != '\0'){

*p3 = *(p3 + 1);

p3 ++;

}

break;

}

p2 ++;

}

p1--;

}

}

int main(int argc, char* argv[])

{

char str[] = "askdaskaskdaserwdagadhjkg";

char dstr[] = "ask" ;

del_ch_in_str(str, dstr);

cout << str << endl;

return 0;

}

Output

dderwdgdhjg