removeWhitespace - test the char casting

rmwsp.cc

/*
clang++ -Wall rmwsp.cc
g++ -Wall rmwsp.cc
*/

#include <string>
#include <iostream>

#define NBSP 160

typedef std::basic_string <unsigned char> ustring;

int main(int argc, char** argv) {

    std::string value;

    std::cout << "Casted constant: " << +static_cast<char>(NBSP) << std::endl;

    if (argc > 1) {
        std::cout << "Got argument..." << std::endl;
        value = std::string(argv[1]);
    }
    else {
        std::cout << "No argument, using default..." << std::endl;
        unsigned char cvalue[] = {102, 111, 111, 160, 98, 97, 114};
        std::string uvalue(cvalue, cvalue+7);
        value = uvalue;
    }
    std::cout << "Old string: '" << value << "'" << std::endl;

    int64_t i = 0;

    while (i < value.size()) {
        // see the numeric values of char items
        std::cout << +value[i] << std::endl;
        // remove whitespaces and non breaking spaces (NBSP)
        if (isspace(value[i]) || (value[i] == static_cast<char>(NBSP))) {
            value.erase(i, 1);
        } else {
          /* if the space is not a whitespace char, increment counter
           counter should not be incremented if a character is erased because
           the index erased will be replaced by the following character */
          i++;
        }
    }
    std::cout << "New string: '" << value << "'" << std::endl;
    return -1;
}