UVa 486 - English-Number Translator

#include <iostream>
#include <string.h>
using namespace std;

int main(){
char data[31][100];

strcpy(data[0], "one");
strcpy(data[1], "two");
strcpy(data[2], "three");
strcpy(data[3] , "four");
strcpy(data[4] , "five");
strcpy(data[5] , "six");
strcpy(data[6] , "seven");
strcpy(data[7] , "eight");
strcpy(data[8] , "nine");
strcpy(data[9] , "ten");
strcpy(data[10] , "eleven");
strcpy(data[11] , "twelve");
strcpy(data[12] , "thirteen");
strcpy(data[13] , "fourteen");
strcpy(data[14] , "fifteen");
strcpy(data[15] , "sixteen");
strcpy(data[16] , "seventeen");
strcpy(data[17] , "eighteen");
strcpy(data[18] , "nineteen");
strcpy(data[19] , "twenty");
strcpy(data[20] , "thirty");
strcpy(data[21] , "forty");
strcpy(data[22] , "fifty");
strcpy(data[23] , "sixty");
strcpy(data[24] , "seventy");
strcpy(data[25] , "eighty");
strcpy(data[26] , "ninety");
strcpy(data[27] , "hundred");
strcpy(data[28] , "thousand");
strcpy(data[29] , "million");
strcpy(data[30] , "negative");

int value, million, thousand, hundred, sign;

char input[300];
char *ptr;

while (cin.getline(input, sizeof(input))){
value = sign = 0;
million = thousand = 1;

ptr = strtok(input, " \n\t\r");

while (ptr){

for(int i = 0; i < 31; ++i){
if (strcmp(data[i], ptr) == 0){
if (i == 0)
value += 1;
else if (i == 1)
value += 2;
else if (i == 2)
value += 3;
else if (i == 3)
value += 4;
else if (i == 4)
value += 5;
else if (i == 5)
value += 6;
else if (i == 6)
value += 7;
else if (i == 7)
value += 8;
else if (i == 8)
value += 9;
else if (i == 9)
value += 10;
else if (i == 10)
value += 11;
else if (i == 11)
value += 12;
else if (i == 12)
value += 13;
else if (i == 13)
value += 14;
else if (i == 14)
value += 15;
else if (i == 15)
value += 16;
else if (i == 16)
value += 17;
else if (i == 17)
value += 18;
else if (i == 18)
value += 19;
else if (i == 19)
value += 20;
else if (i == 20)
value += 30;
else if (i == 21)
value += 40;
else if (i == 22)
value += 50;
else if (i == 23)
value += 60;
else if (i == 24)
value += 70;
else if (i == 25)
value += 80;
else if (i == 26)
value += 90;
else if (i == 27){
value = value * 100;
}
else if (i == 28){
thousand = value * 1000;
value = 0;
}
else if (i == 29){
million = value * 1000000;
value = 0;
}

if (i == 30)
sign = 1;
break;
}// endif
}// end for loop
ptr = strtok(NULL," \n\t\r");
}// end inner while

if (million > 1)
value += million;
if (thousand > 1)
value += thousand;

if (sign)
cout << "-" << value << endl;
else
cout << value << endl;
}
return 0;
}