[Solved] how to separate a number from a string [closed]

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I don’t see your problem with strtok, it would be perfect in this case I think.

In pseudo-code:

line = getline();
split_line_into_tokens(line);
if tokens[0] == "command1" {
    if tokens_num > 2 {
        error("to many arguments to command1");
    } else if tokens_num < 2 {
        error("command1 needs one argument");
    } else {
        do_command_1(tokens[1]);
    }
} else {
    error("unknown command");
}

In the above pseudo-code, split_line_into_tokens() uses strtok to create an array of tokens, using space as the separator. If strtok returns an empty string (not NULL) then there is more than one space used and you skip that. The split_line_into_tokens creates the tokens array, which first entry contains the command, and the remaining contains the arguments. The variable tokens_num is set to the number of tokens in the array.

solved how to separate a number from a string [closed]