参考：https://stackoverflow.com/questions/18273610/c-char-to-const-char-conversion

正确

int bcd(char const * const *argv) {
}

int abc(const char *) {
}

int main(int argc, const char **argv) {
    abc(argv);
    bcd(argv);
}

编译报错

报错 error: invalid conversion from ‘char**’ to ‘const char**’ [-fpermissive]

int abc(const char **argv) {
}

int main(int argc, char *argv[]) {
    abc(argv);
}