zoj 2971 Give Me the Number

//2609243 	2011-07-31 20:05:39 	Accepted 	2971 	C++ 	0 	180 	ylwh!
#include <stdio.h>
#include <string.h>
using namespace std;
char codes[][15]={"zero", "one", "two", "three", "four", "five", "six", "seven",
"eight", "nine", "ten", "eleven", "twelve", "thirteen",
"fourteen", "fifteen", "sixteen", "seventeen","eighteen", "nineteen",
"twenty", "thirty", "forty", "fifty", "sixty", "seventy", "eighty","ninety",
"hundred","thousand", "million", "and"};

int getnum(char * s)
{
int i;
for(i=0; ; i++)
if(strcmp( s, codes[i]) == 0)
{
return i;
}
}

int main()
{
int t, sum, i, j, num, x;
char s[300], temp[100];
scanf("%d", &t);
getchar();
while(t--)
{
gets(s);
j = 0;
num = 0;
sum = 0;
for(i=0; i<=strlen(s); i++)
{
if(s[i] != ' ' && s[i] != '\0')
{
temp[j++] = s[i];
}
else if(s[i] == ' ' || s[i] == '\0')
{
temp[j] = '\0';
x = getnum(temp);
if(x <= 20)
num += x;
else if(x>20 && x<=27)
num += (x - 18) * 10;
else if(x == 28)
{
num = num * 100;
}
else if(x == 30)
{
sum += num * 1000000;
num = 0;
}
else if(x == 29)
{
sum += num * 1000;
num = 0;
}
j = 0;
}
}
printf("%d\n", sum+num);
}
return 0;
}