C / C++ / MFC

Quote:

can pass a vector <string> by reference or have been told to define "local vector" and "return" if from the function.

vector <int> get_rand_vect(size_t size)
{
  vector <int> v;
  while (size--)
  {
    v.push_back(rand());
  }
  return v; // this is optimized by the compiler
}

Quote:

That would not work in my function which retrieves unknown "size" of (string) data.

#include <iostream>
#include <vector>

using namespace std;


vector <int> get_a_fresh_vector_with_unknown_size()
{
  vector <int> v;
  int N = rand() % 128;

  for (int n = 0; n < N; ++n)
    v.push_back( rand() );

  return v;
}


int main()
{
  auto v =  get_a_fresh_vector_with_unknown_size();
  for (auto x : v)
    cout << x << " ";
  cout << endl;
}

jackngill wrote:

...tried to compile to create ECO.COM/EXE but it is not working...

main.c:7:1: error: expected identifier or ‘(’ before ‘for’
 for (i = 1; i < argc; i++) {
 ^~~
main.c:7:15: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘<’ token
 for (i = 1; i < argc; i++) {
               ^
main.c:7:24: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘++’ token
 for (i = 1; i < argc; i++) {
                        ^~
main.c: In function ‘echo’:
main.c:29:28: error: ‘STDIN’ undeclared (first use in this function)
     while(fgets(input, 80, STDIN)){  //read from STDIN (aka command-line)
                            ^~~~~
main.c:29:28: note: each undeclared identifier is reported only once for each function it appears in
main.c: At top level:
main.c:38:7: error: expected identifier or ‘(’ before ‘if’
       if (*char == -x) {
       ^~
main.c:42:7: error: expected identifier or ‘(’ before ‘else’
       else
       ^~~~
main.c:47:14: error: unterminated comment
              /* remove carriage returns from one line /*
              ^

       /* setting flag to remove crlf */
int main()
{
for (i = 1; i < argc; i++) {

            /* Check for a switch (leading "-"). */

        if (argv[i][0] == '-') {

            /* Use the next character to decide what to do. */

            switch (argv[i][1]) {

                case 'x':
                        printf("flag a was called\n");
                        break;

            }
        }
    }

int echo(){
    char input[80];

int echo()
{
    // code for the echo function
}

int main()
{
    // code for main, including any calls to echo
}