Fixing compiler error C2228 left of " " must have class/struct/union

[treefrog]

Hey guys I have my code all written but keep getting the error message "error C2228 left of " " must have class/struct/union. This is the only error message I am getting when I compile my project but I don't know how to fix it at all. If someone can help me out, that'd be great.

The errors are on the lines mentioned below so you don't have to look
- 66
- 74
- 83
- 87
- 88
- 100
- 102
- 103
- 114
- 116

#include <iostream>
#include <fstream>
#include <iomanip>
#include <string>
#include <algorithm>
using namespace std;

const int MAX_ID = 3345;			// Maximum siteIDNumber
const int MAX_WINDSPEED = 22;		// Maximum windSpeed
const int MAX_DAY = 16;				// Maximum dayOfMonth
const int MAX_TEMP = 30;			// Maximum temperature
const int MAX = 10;					// Max array size

struct measured_data_t
{
	int siteIDNumber, dayOfMonth, 
		windSpeed, temperature;
};

int main()
{
	measured_data_t data[MAX];
	char temp[10];
	measured_data_t a_measured_data;
	int i,n,var;
	int max[3]={0,0,0},min[3],diff[3],avg[3]={0,0,0},count[3]={0,0,0};
	n = 0;
	cout << " Weather and Climate Research Data " << endl; 
	cout << " Temp variation & average wind speed " << endl; 
	
	FILE *infilep; /* file pointer */
	infilep = fopen(" C:\Users\David\Desktop\data.txt ", "r"); /* open file in read mode */

	if (infilep == NULL)
		{
			cout << " Cannot Open File - Check File Name " << endl;
		}

	for (i=0;i<8;i++) /* To just skip the first line */
	{
		fscanf(infilep,"%s",&temp);
	}
		for ( i=0; i; )
		{
			fscanf(infilep, "%4d %3d %3d %3d",&a_measured_data.siteIDNumber,&a_measured_data.dayOfMonth,&a_measured_data.windSpeed,&a_measured_data.temperature);
			data[n]=a_measured_data;
			n++;
		}
	fclose(infilep);

cout << " site ID, Day of Month, Wind speed, Temp " << endl;
	
	for( i=0; i; )
	{
		cout << " %4d %3d %3d %3d " << endl;
	}

	cout << " \n\n " << endl;

/* To get the different ID Values */

	n=0;
	diff[0]=data[0].siteIDNumber;
	for ( i=0; i; )
	{
	        if (diff[n]==data.siteIDNumber)
	{
	
		continue;
	}
	else
	{
		n++;
		diff[n]=data.siteIDNumber;
	}
	}

/* To get the Maximum value of temperature for all individual ID */

	n=0;
	for( i=0; i; )
	{
		if (diff[n]==data.siteIDNumber)
		{
			if(max[n])
			{
				max[n]=data.temperature;
				min[n]=data.temperature; //We are setting min value of temperature to maximum value so that it can further be decreased
			}
			n++;
		}
	}

/* To get the Minimum value of temperature for all individual ID */

	for( i=0; i; )
	{
		for(n=0;n<3;n++)
		{
			if(diff[n]==data.siteIDNumber)
			{
				if(min[n]>data.temperature)
				min[n]=data.temperature;
			}
		}
	}

/* to Get the Average windfall for the given ID */

	for( i=0; i; )
	{
		for(n=0;n<3;n++)
		{
			if(diff[n]==data.siteIDNumber)
			{
				avg[n]=avg[n]+data.wind_speed;
				count[n]+=1;
				continue;
			}
		}
	}

/* Display Calculated data */

	cout << " site ID, Max Temp, Min Temp, Variation, Mean Wind speed " << endl;
	for(i=0;i<3;i++)
	cout << " %d\t%d\t%d\t%d\t%d\n " << diff << max << min << max-min << avg << endl;

/* To calculate the value of greatest variation in temperature*/

	var=0;
	for(n=0;n<3;n++)
	{
		if((max[n]-min[n])>var)
		var=max[n]-min[n];
	}

/* Print Greatest Variation in temperature*/

	cout << " Temperature " << endl;
	for(n=0;n<3;n++)
	{
		if((max[n]-min[n])==var)
		cout << " Greatest Variation is at Site Id " << diff[n] << endl;
	}

/* To calculate the value of greatest variation for average wind speed*/

	var=0;
	for(n=0;n<3;n++)
	{
		if((avg[n]/count[n])>var)
		var=avg[n]/count[n];
	}

/* Print Greatest variation in average wind speed */

	cout << " Average Wind Speed " << endl;
	for(n=0;n<3;n++)
	{
		if((avg[n]/count[n])==var)
		cout << " Greatest Variation is at Site ID " << diff[n] << endl;
	}
}

[vlad from moscow]

Next time report the number of the erroneous statement.

I do not see a closing parenthesis in the if statement

	for ( i=0; i; )
	{
	        if (diff[n]==data.siteIDNumber
	{
	
		continue;
	}

[treefrog]

okay thanks i fixed that and I also added the lines that the errors are on.

[Dy7SLyTq]

it would make it easier to just post the whole log..

-line 66: you used diff before giving it any values
same with next two errors. for line 87 im going to assume you didnt give data.temperature a value, especially since you have an error on 88. 100 you still havent given diff a value before using. 102-3 data.tempature still needs a value before using it. 114 you use diff again without giving it a value. data is used without giving it a value

[treefrog]

Okay I see what you are saying but am still confused. I don't understand what you mean by saying that I need to give diff and data.temperature a value. Can you show me what you mean by this?

[Alrededor]

line 66:

if (diff[n]==data.siteIDNumber)

data is an array. You need to specify the index. Did you mean:

if (diff[n]==data[i].siteIDNumber) or

if (diff[n]==data[n].siteIDNumber) ?

You do the same thing on the other lines. I just picked up on the syntax error. I didn't read the code to see what you are actually doing.

Also in your for loops for( i=0; i; ) you never use i. The way they are written they will never execute since i = 0; at the start of the loop and the condition for the loop is also i; which evaluates to false. I'm not sure what you are doing there.

[treefrog]

Got the errors to disappear, thanks Alrededor!