No matching function for call to function error [closed] - c++

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When I am trying to call my function, I get the error:
expected expression []. What do I put inside the []? I put count for each array but then another error saying Undefined symbol: modifiedSortGPA(double, int, std::__1::basic_string<char, std::__1::char_traits, std::__1::allocator >, int)
void modifiedSortGPA(double, int, string, int); //function prototype
...
// my arrays
int netID[NUM_ELMTS]; // Original netID array
string major[NUM_ELMTS]; // Original major array
double GPA[NUM_ELMTS]; // Original GPA array
double sortedGPAbyGPA[NUM_ELMTS]; // GPA array, sorted by GPA
int sortedNetIDbyGPA[NUM_ELMTS];
string sortedMajorbyGPA[NUM_ELMTS];
for (int i = 0; i <= count; i++) //populating my arrays
{
GPA[i] = sortedGPAbyGPA[i];
netID[i] = sortedNetIDbyGPA[i];
major[i] = sortedMajorbyGPA[i];
}
modifiedSortGPA(sortedGPAbyGPA[], sortedNetIDbyGPA[], sortedMajorbyGPA[], count); //function call in main
...
void modifiedSortGPA(double array1[], int array2[], string array3[], int size) //function
{
int startScan, minIndex, minValue;
for (startScan = 0; startScan < (size - 1); startScan++)
{
minIndex = startScan;
minValue = array1[startScan];
for(int index = startScan + 1; index < size; index++)
{
if (array1[index] < minValue)
{
minValue = array1[index];
minIndex = index;
}
}
array1[minIndex] = array1[startScan];
array1[startScan] = minValue;
}
}
I tried to make sure that there were no typos in my prototype, my function call, and my function definition. I am expecting my function to print the sorted arrays.

Answer 1

I tried to make sure that there were no typos in my prototype, my function call, and my function definition.
And yet, you did not succeed in that, because your function's declaration DOES NOT match your function's definition. The values you are passing into the function DO NOT match the declaration, hence the error.
In your declaration, the 1st parameter takes a single double, the 2nd parameter takes a single int, and the 3rd parameter takes a single string.
But, in your definition, the 1st parameter takes a double[] array, the 2nd parameter takes an int[] array, and the 3rd parameter takes a string[] array.
You need to fix the declaration to match the definition, eg:
void modifiedSortGPA(double[], int[], string[], int); //function prototype
On a side note: arrays are 0-indexed, meaning the 1st index is 0 and the last index is 1 less than the element count. But your for loop that is populating the arrays with data is going past the end of the arrays by 1 element, which is undefined behavior . It is trying to access elements at count as the last index, but the last index is count-1 instead. You need to fix that, by use < instead of <= in the loop condition, eg:
for (int i = 0; i < count; i++) //populating my arrays