1 //============================================================================

     2 // Name        : teststrings.cpp

     3 // Author      : Lasse Nielson

     4 //

     5 // Description : Generation of Test Strings for Regular Expressions

     6 //

     7 // Compile     : g++ -o teststrings teststrings.cpp

     8 //============================================================================

     9 

    10 #include <iostream>

    11 #include <string>

    12 #include <sstream>

    13 

    14 using namespace std;

    15 

    16 string str_email(int n) {

    17 	stringstream ss;

    18 	for (int i = 0; i < n; ++i) {

    19 		for (int j = 0; j < i % 27 + 3; ++j)

    20 			ss << (char) ('a' + (j % 26));

    21 		if (n > i + 1)

    22 			ss << "-";

    23 	}

    24 	ss << "@";

    25 	for (int j = 0; j < 2; ++j) {

    26 		for (int i = 0; i < n + 3; ++i)

    27 			ss << (char) ('a' + ((i + j) % 26));

    28 		ss << ".";

    29 	}

    30 	ss << "com";

    31 	return ss.str();

    32 }

    33 

    34 string str_amount(int n) {

    35 	stringstream ss;

    36 	ss << "$";

    37 	for (int i = 0; i < n; ++i) {

    38 		ss << (1 + i) % 10;

    39 		if (n > i + 1 && (n - i) % 3 == 1)

    40 			ss << ",";

    41 	}

    42 	ss << ".53";

    43 	return ss.str();

    44 }

    45 

    46 string str_float(int n) {

    47 	stringstream ss;

    48 	ss << "-";

    49 	for (int i = 0; i < n; ++i) {

    50 		ss << (1 + i) % 10;

    51 	}

    52 	ss << ".";

    53 	for (int i = 0; i < n; ++i) {

    54 		ss << (1 + i) % 10;

    55 	}

    56 	ss << "E+";

    57 	for (int i = 0; i < n; ++i) {

    58 		ss << (1 + i) % 10;

    59 	}

    60 	return ss.str();

    61 }

    62 

    63 int main() {

    64     

    65         int fin = 10;

    66 

    67 	// emails 

    68         for (int i = 1; i < fin; i++) {

    69           cout << str_email(i) << endl;

    70         }

    71 

    72         // dollar amounts

    73         for (int i = 1; i < fin; i++) {

    74 	  cout << str_amount(i) << endl;

    75         }

    76 

    77         // float numbers

    78         for (int i = 1; i < fin; i++) {

    79 	  cout << str_float(i) << endl;

    80         }

    81 

    82 	return 0;

    83 }