Extracting a Certain portion of a String (Substring) in C

Question

I am trying to extract the name of a store from strings that are stored as char arrays using the language C. Each one contains the price of an item and the store it is located at. I have many strings that follow this format, but I have provided I few examples below:

199 at Amazon
139 at L.L.Bean
379.99 at Best Buy
345 at Nordstrom

How could I extract the name of the store from these strings? Thank you in advance.

Answer 1

const char *sought = "at ";
char *pos = strstr(str, sought);
if(pos != NULL)
{
    pos += strlen(sought);
    // pos now points to the part of the string after "at";
}
else
{
    // sought was not find in str
}

If you want to extract a portion after pos, but not the entire remaining string, you can use memcpy:

const char *sought = "o "; 
char *str = "You have the right to remain silent";
char *pos = strstr(str, sought);

if(pos != NULL)
{
    char word[7];

    pos += strlen(sought); 
    memcpy(word, pos, 6);
    word[6] = '\0';
    // word now contains "remain\0"
}