C++笔试题库-------Coding整理

char* strrev1(const char* str)
{
    int len = strlen(str);
    char *temp = new char[len + 1];
    char *p = temp + len;
    *p = ‘\0‘;
    p--;

    while(*str != ‘\0‘)
    {
        *p-- = *str++;
    }
    p = NULL;
    return temp;
}

int strcmp(char *source, char *dest)
{
 
    int ret = 0;   
    while(!(ret = *(unsigned char *)source  - *(unsigned char *)dest) && *dest)   
    {
        ++source;
        ++dest;   
    }
    
    if(ret < 0)
        ret =  -1;   
    else if(ret > 0)   
        ret = 1;   
    
    return ret;   
}