C++ The first element when reading CSV in C

[kenny0541]

I am trying to read data looks like this in a CSV file

[CODE title="My data"]apple,4.2
banana,3.2
orange,5
limon,2[/CODE]

My code is like this, the file can be opened. However, and all the data can be stored in input in s1, and s2. Next, use strcmp to compare s1 with items in app array. If s1 is the same as the element ordered in app array, s2 will be store into S[i]. The others rows in my data work fine, except the first one, apple, even though, the two are the same when I print them out. Can anyone suggest what went wrong?

[CODE title="the output"]s1 is apple.
value is 4.2.
App is apple.
Wrong parameter format for apple.[/CODE]
[CODE lang="c" title="actual code"]void read_parameter(char* path)
{
FILE *fp_parameter;
char s1[nameLen];
char s2[nameLen];
int i = 0;
double S[4];
char *app[] = {"apple", "banana", "orange", "limon"};
fp_parameter = fopen(path, "r");

if (!fp_parameter)
{
printf("Parameter file cannot open...\n");
exit(1);
}
else
{
printf("Parameter file opening...\n");

while (EOF != fscanf(fp_parameter, "%20[^','],%s ", s1, s2))
{
printf("s1 is %s.\n", s1);
printf("value is %s.\n", s2);
printf("App is %s.\n", *(app+i));

if (strcmp(s1, *(app+i)) == 0)
{
S = atof(s2);
printf("Space limitation for %s is %f\n", *(app+i), S);
i++;
}
else
{
printf("Wrong parameter format for %s.\n\n", *(app+i));
i++;
}
}
fclose(fp_parameter);
}
printf("\n");}
}[/CODE]