UVA 10878 Decode the tape

UVA 10878 Decode the tape

#include <stdio.h>
#include <string.h>

char a[105];
int sb[10];
int main()
{
sb[1] = 128;
sb[2] = 64;
sb[3] = 32;
sb[4] = 16;
sb[5] = 8;
sb[7] = 4;
sb[8] = 2;
sb[9] = 1;
while (gets(a) != NULL)
{
if (a[0] == '|')
{
int num = 0;
for (int i = 1; i < strlen(a) - 1; i ++)
{
if(a[i] == 'o')
num += sb[i];
}
printf("%c", num);
}
}
return 0;
}