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errors in my program

nathan1987 (11)
i am getting an error list that consists of:.


>c:\users\nathan\desktop\computer science\arraypractice\arraypractice\arraypractice.cpp(46) : error C2297: '>>' : illegal, right operand has type 'double'
1>c:\users\nathan\desktop\computer science\arraypractice\arraypractice\arraypractice.cpp(46) : warning C4552: '>>' : operator has no effect; expected operator with side-effect
1>c:\users\nathan\desktop\computer science\arraypractice\arraypractice\arraypractice.cpp(50) : error C2143: syntax error : missing ')' before ';'
1>c:\users\nathan\desktop\computer science\arraypractice\arraypractice\arraypractice.cpp(50) : error C2059: syntax error : ')'
1>c:\users\nathan\desktop\computer science\arraypractice\arraypractice\arraypractice.cpp(51) : error C2470: 'grade' : looks like a function definition, but there is no parameter list; skipping apparent body
1>c:\users\nathan\desktop\computer science\arraypractice\arraypractice\arraypractice.cpp(60) : error C2061: syntax error : identifier 'sum'
1>c:\users\nathan\desktop\computer science\arraypractice\arraypractice\arraypractice.cpp(65) : error C2563: mismatch in formal parameter list
1>c:\users\nathan\desktop\computer science\arraypractice\arraypractice\arraypractice.cpp(65) : error C2563: mismatch in formal parameter list
1>c:\users\nathan\desktop\computer science\arraypractice\arraypractice\arraypractice.cpp(65) : error C2065: 'G' : undeclared identifier
1>c:\users\nathan\desktop\computer science\arraypractice\arraypractice\arraypractice.cpp(76) : error C2065: 'sizerow' : undeclared identifier
1>c:\users\nathan\desktop\computer science\arraypractice\arraypractice\arraypractice.cpp(76) : error C2146: syntax error : missing ',' before identifier 'S'
1>c:\users\nathan\desktop\computer science\arraypractice\arraypractice\arraypractice.cpp(78) : error C2065: 'sizerow' : undeclared identifier
1>c:\users\nathan\desktop\computer science\arraypractice\arraypractice\arraypractice.cpp(80) : error C2109: subscript requires array or pointer type
1>c:\users\nathan\desktop\computer science\arraypractice\arraypractice\arraypractice.cpp(82) : error C2109: subscript requires array or pointer type
1>c:\users\nathan\desktop\computer science\arraypractice\arraypractice\arraypractice.cpp(84) : error C2109: subscript requires array or pointer type
1>c:\users\nathan\desktop\computer science\arraypractice\arraypractice\arraypractice.cpp(86) : error C2109: subscript requires array or pointer type
1>Build log was saved at "file://c:\Users\Nathan\Desktop\Computer Science\arraypractice\arraypractice\Debug\BuildLog.htm"
1>arraypractice - 27 error(s), 1 warning(s)


my program is as follows:

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#include <iostream>
#include <fstream>
using namespace std;

const int row=4;
const int colo=3;

string name[row];
double grade[row][colo];

ifstream input1;input2;

void letter_grad(string name[row], double grade[row][colo]);
void read(string name[row], double grade[row][colo]);
void write(string name[row], double grade[row][colo]);
void total(double grade[row][colo], sum[row]);
void sum(double grade[sizerow][sizecolo], total [sizerow])

void main()
{
	string n[row];
	double G[row][colo];
	read(name,grade);
	write(name,grade);
	avg(grade,size);
	sum(grade,size);
	
	char L[row];
	double size[row];
	double avg[row];


	input1.close();
	input2.close();
}

void read(string name[row], double grade[row][colo])
{
	input1.open ("C:\\Users\\Nathan\\Desktop\\array.txt");
	input2.open ("C:\\Users\\Nathan\\Desktop\\array1.txt");

	for (int r=0; r<row; r++)
	{
		input1>>name[row];
		for (int c=0; c<colo; c++)
			input2>>grade[row][colo];
	}
}

void write(string name[row]; double grade[row][colo])
{
	for(int r=0; r<row; r++)
	{
		cout<<name[row];
		for (int colo; c<colo; c++)
			cout<< "\t" << grade[row][colo]<<" ";
	}
}

void sum(double grade[row][colo], sum[row])
{
	for (int r=0; r<row; r++)
	{
		for (int c=0; c<colo; c++)
			sum[colo] = sum[colo]+G[row][colo];
	}
}

void avg(double sum[row], double average[row])
{
	for (int r=0; r<row; r++)
		average[r]=sum[r]/colo;
}


void letter_grade(double avg[sizerow], char letter S[row])
{
	for (int i=0; i < sizerow-1; i++)
		if (avg [i] >= 90)
			letter[i]='A';
		else if (avg [i] >=80)
		    letter[i]='B';
		else if (avg [i] >=70)
		    letter[i]='C';
		else if (avg [i] >=60)
			letter[i]='D';
		else
		    avg[i] = 'F';
}
coder777 (8444)
you have several errors

line 11 should be: ifstream input1, input2;
line 14/37: passing an fixed size array in this way it should be void read(string (&name)[row], const double (&grade)[row][colo]) all other alike

line 15/50: void write(const string (&name)[row], const double (&grade)[row][colo])

use const for those you don't want to modify and non const for those you want to modify
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