Count items in array with specified value (MLQ4)

[[Deleted]]

How can I count the number of items in an array that have the value of "USDCHF"?

 

int start() {

   string xyz[99];
   xyz[0] = "USDCAD";
   xyz[1] = "USDCHF";
   xyz[2] = "EURUSD";
   xyz[3] = "USDJPY";
   xyz[4] = "AUDUSD";
   xyz[5] = "USDCHF";
   xyz[6] = "USDCHF";
   xyz[7] = "USDJPY";
   xyz[9] = "AUDUSD";

   Alert( countXYZ("USDCHF") );
   
   return(0);
  
}

void countXYZ (string x) {
 return(3);
}

 

[Simon Gniadkowski]

hknight:

How can I count the number of items in an array that have the value of "USDCHF"?

How would you do it manually with a piece of paper and a pencil ?

[William Roeder]

hknight: How can I count the number of items in an array that have the value of "USDCHF"?

1.    string xyz[99];
      xyz[0] = "USDCAD";
      xyz[1] = "USDCHF";
      xyz[2] = "EURUSD";
      xyz[3] = "USDJPY";
      xyz[4] = "AUDUSD";
      xyz[5] = "USDCHF";
      xyz[6] = "USDCHF";
      xyz[7] = "USDJPY";
      xyz[9] = "AUDUSD";
   

   You can NOT access uninitialized strings. xyz[8] and xyz[10..]

2. ---

   If these are constant, you can initialze them with

      string xyz[]={ "USDCAD", "USDCHF", "EURUSD", "USDJPY",
                     "AUDUSD", "USDCHF", "USDCHF", "USDJPY",
                     "AUDUSD"};

   ---

3. Pass the array and return a value	Alert( countXYZ("USDCHF", xyz, 9) );    return(0); } int countXYZ (string x, string xyz[], int n){   int count=0;   for(int i=n-1; i>=0; i--) if (xyz[i]==x) count++;   return(count); } What are Function return values ? How do I use them ? - MQL4 forum
   or	Alert( countXYZ("USDCHF", xyz) );    return(0); } int countXYZ (string x, string xyz[], n=WHOLE_ARRAY){   if (n==WHOLE_ARRAY) n = ArraySize(xyz);   int count=0;   for(int i=n-1; i>=0; i--) if (xyz[i]==x) count++;   return(count); }