樱之花

WSAStartup(MAKEWORD(2, 1), &wsaData); 为什么 会出错
#pragma   comment(lib, "Ws2_32.lib ");

凡是在link里报告error   LNK2001:   unresolved   external   symbol   __imp__WSAGetLastError@0之类的都是没有导入lib。。或者是只添加了h到工程，而没有把cpp添加到工程中。

比较两个字符串是否相等
int strcmp(const char *a, const char *b)
{
    while(*a && *b) {
        if(*a++ != *b++) return 1;
    }
    if(*a || *b) return 1;
    return 0;
}
///////////////////////////////////
while(*a && *b) {
        if(*a++ != *b++){
            cout<<"!Equal...";
            return 0;
        }
    }
    if(*a || *b)
        cout<<"!Equal...";
    else
        cout<<"Equal...";
    return 0;

strcmp
Syntax:
  #include <string.h>
  int strcmp( const char *str1, const char *str2 );



The function strcmp() compares str1 and str2, then returns:

Return value Explanation
less than 0 str1 is less than str2
equal to 0 str1 is equal to str2
greater than 0 str1 is greater than str2

For example:

    printf( "Enter your name: " );
    scanf( "%s", name );
    if( strcmp( name, "Mary" ) == 0 )
      printf( "Hello, Dr. Mary!\n" );