从char数组中删除双空格

#include <iostream>

void removeDoubleSpaces(char* str) {
    int i = 0;
    int j = 0;
    bool spaceFlag = false;

    while (str[i] != '\0') {
        if (str[i] == ' ') {
            if (spaceFlag) {
                i++;
                continue;
            }
            spaceFlag = true;
        } else {
            spaceFlag = false;
        }

        str[j] = str[i];
        i++;
        j++;
    }

    str[j] = '\0';
}

int main() {
    char str[] = "This  is  a  test  string.";
    std::cout << "Before removing double spaces: " << str << std::endl;

    removeDoubleSpaces(str);

    std::cout << "After removing double spaces: " << str << std::endl;

    return 0;
}

Before removing double spaces: This  is  a  test  string.
After removing double spaces: This is a test string.