C 练习实例32

实例

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
 
/* 删除字符串中指定字母函数 */
char* deleteCharacters(char * str, char * charSet)
{
    int hash [256];
    if(NULL == charSet)
        return str;
    for(int i = 0; i < 256; i++)
        hash[i] = 0;
    for(int i = 0; i < strlen(charSet); i++)
        hash[charSet[i]] = 1;
    int currentIndex = 0;
    for(int i = 0; i < strlen(str); i++)
    {
        if(!hash[str[i]])
            str[currentIndex++] = str[i];
    }
    str[currentIndex] = '\0';
    return str;
}
 
int main()
{
    char s[2] = "a";     /* 要删除的字母 */
    char s2[5] = "aca";  /* 目标字符串 */
    printf("%s\n", deleteCharacters(s2, s));
    return 0;
}

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