How can I compare strings in C using a `switch` statement?

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If you mean, how to write something similar to this:

// switch statement
switch (string) {
  case "B1": 
    // do something
    break;
  /* more case "xxx" parts */
}

Then the canonical solution in C is to use an if-else ladder:

if (strcmp(string, "B1") == 0) 
{
  // do something
} 
else if (strcmp(string, "xxx") == 0)
{
  // do something else
}
/* more else if clauses */
else /* default: */
{
}

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