删除给定字符的算法

 1 #include<stdio.h>
 2 
 3 void delChar(char * str, char p){
 4     int i = 0;
 5     int j = 0;
 6     while(str[j] != NULL){
 7         if(str[j] == p)
 8             j++;
 9         else{
10             str[i] = str[j];
11             i++;
12             j++;
13         }
14     }
15     str[i] = ‘\0‘;
16 }
17 
18 int main(){
19     char test[18] = "www.baidu.com";
20     delChar(test, ‘w‘);
21     puts(test);
22 //    free(s);
23     return 0;
24 } 

 1 #include<stdio.h>
 2 #include<string.h>
 3 #include<malloc.h>
 4 
 5 char * delChar(char* str, char x){
 6     int len = strlen(str);
 7     if(str == NULL)
 8         return NULL;
 9     
10     char *p = (char*)malloc(len + 1); 
11     char *q = p;
12     while(*str != ‘\0‘){
13         if(*str == x)
14             str++;
15         else {
16             *p++ = *str;
17             str++;
18         }
19     }
20     *p = ‘\0‘;
21     return q;
22 }
23 
24 int main(){
25     char test[18] = "www.baidu.com";
26     char *s = delChar(test, ‘w‘);
27     puts(s);
28     free(s);
29     return 0;
30 }