word count

WC项目要求：实现一个统计程序，它能正确统计程序文件中的字符数、单词数、行数、以及其他功能，并能够快速地处理多个文件。

代码来源：http://www.cnblogs.com/hgcrown/p/5311155.html 

Github 地址https://github.com/fengyulouxiao/WC/commit/dced8a000ec67828c23313dd9294f2d01ad9cb0e

内容：

#include "iostream"
#include "string"
#include "stdio.h"

using namespace std;

FILE *file;
int chars = 0, words = 0, lines = 1, symbols = 0, s[500];
char c;
//定义全局变量

void index()
{
cout << " ********************主菜单*********************" << endl;
cout << " * *" << endl;
cout << " * 1、显示字符数、单词数和行数 *" << endl;
cout << " * *" << endl;
cout << " * 2、显示符号数 *" << endl;
cout << " * *" << endl;
cout << " * 3、显示行数及行分类 *" << endl;
cout << " * *" << endl;
cout << " * 4、显示所有 *" << endl;
cout << " * *" << endl;
cout << " * 5、退出 *" << endl;
cout << " * *" << endl;
cout << " ***********************************************" << endl;
cout << " * 请选择需要的功能：";
}//主菜单函数

void analyse()
{
while ((c = fgetc(file)) != EOF)
{
chars++;
if (((c <= 'z') && (c >= 'a')) || ((c <= 'Z') && (c >= 'A')) || ((c >= '0') && (c <= '9')))
{
words++;
while ((c = fgetc(file)) != EOF)
{
chars++;
if (((c <= 'z') && (c >= 'a')) || ((c <= 'Z') && (c >= 'A')) || ((c >= '0') && (c <= '9')))
{
}
else if (c == '\n')
{
s[lines] = 1;
lines++;
break;
}
else if (c == ' ')
break;
else
{
symbols++;
break;
}
}
}
else if (c == '/')
{
if ((c = fgetc(file)) == '/')
{
symbols += 2;
s[lines] = 2;
fseek(file, -1L, SEEK_CUR);
}
}
else if (c == '\n')
{
if (s[lines] != 2)
s[lines] = 1;
lines++;
}
else if (c == ' ')
{
}
else
symbols++;
}
if (s[lines] != 2)
s[lines] = 1;
}//分析所有字符数、单词数、行数及行类的函数

int main()
{
char name[30], b;
int a, i, j;
cout << " * 请输入源文件名:";
for (;;)
{
cin >> name;
if ((file = fopen(name, "r")) != NULL)
break;
else
cout << " * 文件路径错误！请重新输入源文件名:";
}
analyse();
fclose(file);
index();
cin >> a;
while (a != 5)
{
switch (a)
{
case 1:cout << " * 字符数：" << chars << endl;
cout << " * 单词数：" << words << endl;
cout << " * 行数 ：" << lines << endl;
cout << " * 按任意键返回：";
b = getchar();
b = getchar();
break;
case 2:cout << " * 符号数：" << symbols << endl;
cout << " * 按任意键返回：";
b = getchar();
b = getchar();
break;
case 3:cout << " * 行数：" << lines << endl;
for (i = 1; i <= lines; i++)
{
if (s[i] == 1)
{
if (i<10)
cout << " * 第" << i << "行为 代码行" << endl;
else if (i<100)
cout << " * 第" << i << "行为 代码行" << endl;
else
cout << " * 第" << i << "行为 代码行" << endl;
}
else if (s[i] == 2)
{
if (i<10)
cout << " * 第" << i << "行为 注释行" << endl;
else if (i<100)
cout << " * 第" << i << "行为 注释行" << endl;
else
cout << " * 第" << i << "行为 注释行" << endl;
}
}
cout << " * 按任意键返回：";
b = getchar();
b = getchar();
break;
case 4:cout << " * 字符数：" << chars << endl;
cout << " * 单词数：" << words << endl;
cout << " * 符号数：" << symbols << endl;
cout << " * 行数 ：" << lines << endl;
for (j = 1; j <= lines; j++)
{
if (s[j] == 1)
{
if (j<10)
cout << " * 第" << j << "行为 代码行" << endl;
else if (j<100)
cout << " * 第" << j << "行为 代码行" << endl;
else
cout << " * 第" << j << "行为 代码行" << endl;
}
else if (s[j] == 2)
{
if (j<10)
cout << " * 第" << j << "行为 注释行" << endl;
else if (j<100)
cout << " * 第" << j << "行为 注释行" << endl;
else
cout << " * 第" << j << "行为 注释行" << endl;
}
}
cout << " * 按任意键返回：";
b = getchar();
b = getchar();
break;
}
system("cls");
index();
cin >> a;
}
return 0;
}//主函数

博主是用了代码system("cls")进行清屏操作和C中的fseek(file,-1L,SEEK_CUR)代码，没有用c++中的文件操作，需要改善。