程序代码：

#include<stdio.h>
#include<stdlib.h>
#include<string.h>
char *deleteChar(char *str,char *Delete)
{
    int hash[256];
    if(Delete==NULL)        
        return str;
    int i,j,k;                 
    for(i=0;i<256;i++)                //给hash数组赋初值
        hash[i]=0;
    for(j=0;j<strlen(Delete);j++)    //将要删除的字符对应的ASCII码对应的数组赋值1
        hash[Delete[j]]=1;
    int count;
    for(k=0;k<strlen(str);k++)        //查找目标字符串，并删除
        if(hash[str[k]]==0)
        {
            str[count]=str[k];
            count++;
        }
    str[count]='\0';
    return str;
}
int main()
{
    char *str,*Delete;
    printf("输入目标字符串：\n");
    scanf("%s",str);        //输入目标字符
    printf("输入要删除的字符：\n");
    scanf("%s",Delete);        //输入要删除的字符    
    deleteChar(str,Delete);
    printf("结果为：");
    printf("%s",str);
}