c++ - Error when passing array to function -

i'm new c++ , writing program supposed following:

1. fill array of integers based on user-defined constant.
2. pass array in step # 1 function computes mean of integers in array.
3. pass array in step # 2 function computes standard deviation of integers in array.

here's code:

#include "stdafx.h" #include <iostream> #include <cmath> using namespace std;  const int size_of_array = 100; int custarray[];  void fillarray(int size_of_array); double standarddeviation(double[], int); double mean(double[], int); double arithmeticaverage;  int _tmain(int argc, _tchar* argv[]) {     int i;     fillarray(size_of_array);     cout << "\n";     cout << "the mean is: " << mean(custarray[], i);     cout << endl;     cout << "the standard deviation is: " << standarddeviation(custarray[], i);      return 0; }  void fillarray(int size_of_array) {     int = 0;     custarray[0] = { 1 };     (int = 0; < size_of_array; i++)      custarray[i] = + 1;      return; }  double mean(double custarray[], int size_of_array) {     double sumofelements = 0;     int i;     (i = 0; < size_of_array; i++)     {     sumofelements += custarray[i];     }     arithmeticaverage = sumofelements / i;     return (arithmeticaverage);  }  double standarddeviation(double custarray[], int size_of_array) {     double standarddeviation;     double tempsum = 0;      (int = 0; < size_of_array; i++)     {     tempsum += pow((custarray[i] - arithmeticaverage), 2);     }     standarddeviation = sqrt(tempsum / (size_of_array));     return (standarddeviation); } 

i'm getting error in following lines of code:

cout << "the mean is: " << mean(custarray[], i); 

and

cout << "the standard deviation is: " << standarddeviation(custarray[], i); 

that reads: "syntax error: ']'

why?

there's lot of problems in program. however, did fix them , compiles without errors.

• first of all, dont pass arrays functuin [] after name; type variable name.

• second, mean() , standarddeviation() functions both had array declared double.

• third, passed variable i main() not initialized. think meant pass size_of_array.

• fourth, need create main function this: int main(). original program had int _tmain(int argc, _tchar* argv[]) microsoft specific standard.

---

#include <iostream> #include <cmath> using namespace std;  const int size_of_array = 100; int custarray[size_of_array];  void fillarray(int size_of_array); double standarddeviation(int[], int); double mean(int[], int); double arithmeticaverage;  int main() {      //int i; no need      fillarray(size_of_array);      cout << "\n";     cout << "the mean is: " << mean(custarray, size_of_array);     cout << endl;     cout << "the standard deviation is: " << standarddeviation(custarray, size_of_array);      return 0; }   void fillarray(int size_of_array) {     int = 0;      custarray[0] = { 1 };      (int = 0; < size_of_array; i++)          custarray[i] = + 1;      return; }  double mean(int custarray[], int size_of_array) {     double sumofelements = 0;     int i;      (i = 0; < size_of_array; i++)     {         sumofelements += custarray[i];     }     arithmeticaverage = sumofelements / i;     return (arithmeticaverage);  }  double standarddeviation(int custarray[], int size_of_array) {     double standarddeviation;     double tempsum = 0;      (int = 0; < size_of_array; i++)     {         tempsum += pow((custarray[i] - arithmeticaverage), 2);     }     standarddeviation = sqrt(tempsum / (size_of_array));     return (standarddeviation); }