Question

我从SEE开始编程抽象（CS106B）。我很难开始任务。这是热身练习的代码。我已经咨询了各种不同的解决方案，但没有一个能够工作，因此，我们不得不在这里发布。

#include <iostream>
#include <cstring>
#include "console.h"
using namespace std;

/* Constants */

const int HASH_SEED = 5381;               /* Starting point for first cycle */
const int HASH_MULTIPLIER = 33;           /* Multiplier for each cycle      */
const int HASH_MASK = unsigned(-1) >> 1;  /* All 1 bits except the sign     */

/* Function prototypes */

int hashCode(string name);

/* Main program to test the hash function */

int main() {
   string name = getLine("Please enter your name: ");
   int code = hashCode(name);
   cout << "The hash code for your name is " << code << "." << endl;
   return 0;
}

/*
 * Function: hash
 * Usage: int code = hashCode(key);
 * --------------------------------
 * This function takes the key and uses it to derive a hash code,
 * which is nonnegative integer related to the key by a deterministic
 * function that distributes keys well across the space of integers.
 * The general method is called linear congruence, which is also used
 * in random-number generators.  The specific algorithm used here is
 * called djb2 after the initials of its inventor, Daniel J. Bernstein,
 * Professor of Mathematics at the University of Illinois at Chicago.
 */

int hashCode(string str) {
   unsigned hash = HASH_SEED;
   int nchars = str.length();
   for (int i = 0; i < nchars; i++) {
      hash = HASH_MULTIPLIER * hash + str[i];
   }
   return (hash & HASH_MASK);
}

编译日志：

> 1>------ Build started: Project: Warmup, Configuration: Debug Win32 ------
1>Compiling...
1>Warmup.cpp
1>c:\users\users\google drive\courses\programming abstractions (stanford cs106b) 2012\assignments\assignment1-vs2008\assignment1-vs2008\0-warmup\src\warmup.cpp(30) : error C3861: 'getLine': identifier not found
1>Build log was saved at "file://c:\Users\Users\Google Drive\Courses\Programming Abstractions (Stanford CS106B) 2012\Assignments\Assignment1-vs2008\Assignment1-vs2008\0-Warmup\Warmup\Debug\BuildLog.htm"

1>Warmup - 1 error(s), 0 warning(s)
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========

Answer 1

快速浏览Stanford's C++ library的文档，通过CS106B的主页找到（我知道这听起来不可信，但确实如此），显示你应该

 #include "simpio.h"

我建议您为文档添加书签;它可以帮助你避免许多深夜的家庭作业恐慌。

Answer 2

首先，您必须包含标题<string>而不是<cstring>

#include <string>

其次使用getline代替getLine。并且参数的类型和数量指定不正确。也许你想使用其他一些用户定义的函数getLine。

错误C3861：＆＃39; getLine＆＃39;：未找到标识符

2 个答案: