源代码：
#include <iostream>
#include <cstdio>
#include <cstring>
#include <windows.h>
#include <conio.h>
using namespace std;//The namespace.
int top = 0;
int lines = 0;
bool inDoubleQuote;
bool inSingleQuote;
bool isPreprocessor;
bool isStringInPreprocessor;
bool isSingleLineComment;
bool isMoreLinesComment;
/*The variables.*/
char word[101];
string str[1000001];
string reservedWords[56] =
{
"if", "else", "while", "signed", "throw", "union", "this",
"int", "char", "double", "unsigned", "const", "goto", "virtual",
"for", "float", "break", "auto", "class", "operator", "case",
"do", "long", "typedef", "static", "friend", "template", "default",
"new", "void", "register", "extern", "return", "enum", "inline",
"try", "short", "continue", "sizeof", "switch", "private", "protected",
"asm", "catch", "delete", "public", "volatile", "struct", "using",
"namespace", "bool", "true", "false", "not", "and", "or"
};
bool IsReservedWord();
bool IsNumber();
int main()
{
system("color F0");
freopen("main.cpp", "r", stdin);
string s;
while (getline(cin, s))
{
str[lines] = s;
lines++;
}
fclose(stdin);
SetConsoleScreenBufferSize(GetStdHandle(STD_OUTPUT_HANDLE), (COORD){80, (short)(lines+1)});
isMoreLinesComment = false;
for (int i=0; i<lines; i++)
{
CONSOLE_SCREEN_BUFFER_INFO consoleScreenBufferSize;
GetConsoleScreenBufferInfo(GetStdHandle(STD_OUTPUT_HANDLE), &consoleScreenBufferSize);
if (consoleScreenBufferSize.dwSize.X < str[i].length()+4)
{
SetConsoleScreenBufferSize(GetStdHandle(STD_OUTPUT_HANDLE), (COORD){(short)(str[i].length()+5), consoleScreenBufferSize.dwSize.Y});
}
SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE), FOREGROUND_GREEN|BACKGROUND_BLUE|BACKGROUND_GREEN|BACKGROUND_RED);
printf("%3d ", i+1);
isSingleLineComment = false;
top = 0;
inDoubleQuote = false;
inSingleQuote = false;
isPreprocessor = false;
isStringInPreprocessor = false;
memset(word, 0, sizeof(word));
for (int j=0; j<str[i].length(); j++)
{
if (not(isSingleLineComment or isMoreLinesComment))
{
if (inDoubleQuote==false and inSingleQuote==false)
{
if (str[i][j]=='/' and j+1<str[i].length() and str[i][j+1]=='/')
{
isSingleLineComment = true;
SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE), FOREGROUND_GREEN|BACKGROUND_BLUE|BACKGROUND_GREEN|BACKGROUND_RED|BACKGROUND_INTENSITY);
cout << str[i][j];
continue;
}
else if (str[i][j]=='/' and j+1<str[i].length() and str[i][j+1]=='*')
{
isMoreLinesComment = true;
SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE), FOREGROUND_GREEN|BACKGROUND_BLUE|BACKGROUND_GREEN|BACKGROUND_RED|BACKGROUND_INTENSITY);
cout << str[i][j];
continue;
}
}
if (inDoubleQuote == false and inSingleQuote == false and isPreprocessor == false)
{
if ((str[i][j]>='a' and str[i][j]<='z') or (str[i][j]>='A' and str[i][j]<='Z') or (str[i][j]>='0' and str[i][j]<='9'))
{
top++;
word[top] = str[i][j];
}
else
{
if (top > 0)
{
if (IsReservedWord())
{
SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE), FOREGROUND_BLUE|FOREGROUND_INTENSITY|BACKGROUND_BLUE|BACKGROUND_GREEN|BACKGROUND_RED|BACKGROUND_INTENSITY);
}
else if (IsNumber())
{
SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE), FOREGROUND_GREEN|BACKGROUND_BLUE|BACKGROUND_GREEN|BACKGROUND_RED|BACKGROUND_INTENSITY);
}
else
{
SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE), 0|BACKGROUND_BLUE|BACKGROUND_GREEN|BACKGROUND_RED|BACKGROUND_INTENSITY);
}
for (int k=0; k<top; k++)
{
cout << word[k];
}
top = 0;
}
if (str[i][j] == '\"' and inSingleQuote == false)
{
SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE), FOREGROUND_RED|BACKGROUND_BLUE|BACKGROUND_GREEN|BACKGROUND_RED|BACKGROUND_INTENSITY);
cout << str[i][j];
inDoubleQuote = !inDoubleQuote;
}
else if (str[i][j] != '#')
{
SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE), 0|BACKGROUND_BLUE|BACKGROUND_GREEN|BACKGROUND_RED|BACKGROUND_INTENSITY);
if (inDoubleQuote == false and str[i][j] == '\'')
{
inSingleQuote = !inSingleQuote;
}
cout << str[i][j];
}
else
{
SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE), FOREGROUND_BLUE|FOREGROUND_INTENSITY|BACKGROUND_INTENSITY|BACKGROUND_BLUE|BACKGROUND_GREEN|BACKGROUND_RED);
cout << str[i][j];
isPreprocessor = true;
}
}
}
else if (isPreprocessor == false)
{
if (str[i][j] == '\"' and inDoubleQuote == true)
{
inDoubleQuote = !inDoubleQuote;
SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE), FOREGROUND_RED|BACKGROUND_BLUE|BACKGROUND_GREEN|BACKGROUND_INTENSITY|BACKGROUND_RED);
}
else if (str[i][j] == '\'' and inSingleQuote == true)
{
inSingleQuote = !inSingleQuote;
SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE), 0|BACKGROUND_RED|BACKGROUND_GREEN|BACKGROUND_BLUE|BACKGROUND_INTENSITY);
}
cout << str[i][j];
}
else
{
if (not isStringInPreprocessor)
{
if (str[i][j] == '<' or str[i][j] == '\"')
{
isStringInPreprocessor = true;
SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE), FOREGROUND_RED|BACKGROUND_BLUE|BACKGROUND_GREEN|BACKGROUND_INTENSITY|BACKGROUND_RED);
}
else
{
SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE), FOREGROUND_BLUE|FOREGROUND_INTENSITY|BACKGROUND_BLUE|BACKGROUND_GREEN|BACKGROUND_INTENSITY|BACKGROUND_RED);
}
cout << str[i][j];
}
else
{
SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE), FOREGROUND_RED|BACKGROUND_RED|BACKGROUND_INTENSITY|BACKGROUND_GREEN|BACKGROUND_BLUE);
cout << str[i][j];
if (str[i][j] == '>' or str[i][j] == '\"')
{
isStringInPreprocessor = false;
}
}
}
}
else
{
SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE), FOREGROUND_GREEN|BACKGROUND_BLUE|BACKGROUND_GREEN|BACKGROUND_INTENSITY|BACKGROUND_RED);
cout << str[i][j];
if (j>0 and str[i][j-1]=='*' and str[i][j]=='/')
{
isMoreLinesComment = false;
}
}
}
if (top > 0)
{
if (IsReservedWord())
{
SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE), FOREGROUND_BLUE|FOREGROUND_INTENSITY|BACKGROUND_BLUE|BACKGROUND_GREEN|BACKGROUND_RED|BACKGROUND_INTENSITY);
}
else if (IsNumber())
{
SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE), FOREGROUND_GREEN|BACKGROUND_BLUE|BACKGROUND_GREEN|BACKGROUND_RED|BACKGROUND_INTENSITY);
}
else
{
SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE), 0|BACKGROUND_BLUE|BACKGROUND_GREEN|BACKGROUND_RED|BACKGROUND_INTENSITY);
}
for (int k=0; k<top; k++)
{
cout << word[k];
}
top = 0;
}
cout << endl;
}
getch();
return 0;
}
bool IsReservedWord()
{
for (int i=0; i<top; i++)
{
word[i] = word[i+1];
}
word[top] = 0;
for (int i=0; i<56; i++)
{
if (word == reservedWords[i])
{
return true;
}
}
return false;
}
bool IsNumber()
{
for (int i=0; i<top; i++)
{
if (not(word[i]>='0' and word[i]<='9'))
{
return false;
}
}
return true;
}运行效果：
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