Having problems with cstring arrays - c++

Question

I am having trouble with my code with something with arrays. I am getting the following errors
In function ‘int main(int, const char**)’:
75: error: cannot convert ‘char*’ to ‘char (*)[81]’ for argument ‘1’ ion(char (*)[81], OneItem*, int&, int&)’
In function ‘void parseInformation(char (*)[81], OneItem*, int&, in
164: error: ISO C++ forbids comparison between pointer and integer
166: error: incompatible types in assignment of ‘const char [2]’ to
169: error: ISO C++ forbids comparison between pointer and integer
174: error: ISO C++ forbids comparison between pointer and integer
174: error: ISO C++ forbids comparison between pointer and integer
176: error: invalid conversion from ‘char*’ to ‘char’
The code doesn't line up with the line numbers. I have tried multiple things googled some things still haven't found a solution.
const int MAX_CHARACTERS = 80;
const int MAX_INVENTORY = 12;
typedef char OneLine[MAX_CHARACTERS + 1];
struct OneItem
{
char product[MAX_CHARACTERS + 1];
int quantity;
float unitPrice;
float totalPrice;
};
int main( const int argc, const char* argv[] )
{
OneLine fileName;
ifstream inFile;
OneLine readLine;
OneItem inventory[MAX_INVENTORY];
int readLineIndex;
int structureCounter = 0;
int averageQuantity;
float averagePrice;
float averageTotalPrice;
displayIntroduction();
getFileName( argc, argv, fileName );
if (!inFile)
{
cout << "File not found: " << fileName << endl;
}
else
{
inFile.open(fileName);
while(!inFile.getline(readLine, MAX_CHARACTERS, '\n').eof())
{
if (structureCounter < MAX_INVENTORY)
{
parseInformation(readLine,inventory, readLineIndex, structureCounter);
}
}
void parseInformation(OneLine readLine[],OneItem inventory[], int & readLineIndex, int & structureCounter)
{
int tempIndex = 0;
int valueCounter = 0;
OneLine tempArray;
while(readLine[readLineIndex] != '\n')
{
tempArray = "\0";
while(readLine[readLineIndex] == ' ')
{
readLineIndex += 1;
}
while(readLine[readLineIndex] != ' ' && readLine[readLineIndex] != '\n')
{
tempArray[tempIndex] = readLine[readLineIndex];
tempIndex += 1;
readLineIndex += 1;
}
if(valueCounter == 0)
{
for(int i = 0; i <= strlen(tempArray); i++)
{
inventory[structureCounter].product[i] = tempArray[i];
}
valueCounter += 1;
}
else if(valueCounter == 1)
{
inventory[structureCounter].quantity = atoi(tempArray);
valueCounter += 1;
}
else
{
inventory[structureCounter].unitPrice = atof(tempArray);
structureCounter += 1;
}
}
return;

Answer 1

Your definition of parseInformation is wrong. It says that readLine should be an array of OneLine, but it only wants a single OneLine. It should be:
void parseInformation(OneLine readLine,OneItem inventory[], int & readLineIndex, int & structureCounter)
This is causing all the errors you're getting, because you're calling the function with a single OneLine, not an array. And inside the function you're comparing readLine[readLineIndex] with a character, which requires readLine to be an array of characters, not an array of OneLine.
The OneLine typedef makes this an array already, you didn't need to add [] to the parameter declaration.

Answer 2

As Barmar said you need to change first argument, but there is one more problem, here:
OneLine tempArray;
while(readLine[readLineIndex] != '\n')
{
tempArray = "\0";
You cannot make such assign. tempArray needs to be of type const char* or you need to make it this way:
tempArray[some_index] = '\0';