: warning C4552: '>' : operator has no effect; expected operator with side-effect

[biogig]

so I've been trying to write this program that takes the data from a file and outputs the year the rainfall how much it is below/above the average, the average raifall and the std deviation and for some reason I get three

C4552 warnings:'>': operator has no effect on three for loops. 

Help is highly appreciated :(

#include<iostream>
#include<fstream>
#include<iomanip>
#include<string>
#include<cstring>
#include<cstdlib>

using namespace std;

void readFile(int month[],int year[],double rain[],const int size);

double averageRainfall(double rain[],const int size);
double belowRainfall(double size,double rain[],double Below[]);
double standardDeviation(double Below[],double size);
string monthName(int month[], const int size,string monthN[]);



int main()

{

const int size=12;
int year[size]={0};
int month[size]={0};
double rain[size]={0};
double Below[size]={0};
string monthN[size]={0};






int i;
i=0;

readFile(month,year,rain,size);
belowRainfall(size,rain,Below);
monthName(month,size,monthN);



cout<<"MONTH"<<"\t"<<"YEAR"<<"\t"<<"RAINFALL"<<"\t"<<"BELOW"<<endl;

for(i>0;i<size;i++)
cout<<monthN[i]<<"   \t"<<year[i]<<"\t"<<rain[i]<<"\t"<<"\t"<<setprecision(2)<<Below[i]<<endl;




cout<<"\n"<<"Average rainfall is  "<<setprecision(2)<<averageRainfall(rain,size)<<endl;


cout<<"\n"<<"Standard deviation is "<<setprecision(2)<<standardDeviation(Below,size)<<"\n"<<endl;

return 0;
}


void readFile(int month[],int year[],double rain[],const int size)
{

  int i;
ifstream inFile;
 inFile.open("rainfall.txt");
 if(!inFile)
 {
  cout<<"File could not open!"<<endl;
 exit(1);
 }

 for(i=0;i<size;i++)
  inFile>>month[i]>>year[i]>>setprecision(2)>>rain[i];
 inFile.close();
}


double averageRainfall(double rain[],const int size)
{
    int i;
    double sum;
    double average;
    sum=0;
    average=0;

    for (i=0;i<size;i++)
        sum=sum+rain[i];
        average=sum/size;

        return average;
}

double belowRainfall(double size,double rain[],double Below[])
{
    int i;
    double sum;
    double average;
    sum=0;
    average=0;

    for (i=0;i<size;i++)
        sum=sum+rain[i];
        average=sum/size;

        for (i=0;i<size;i++)
            Below[i]=rain[i]-average;

        return Below[i];
}

double standardDeviation(double Below[],double size)
{
    double sum;
    sum=0;
    int i;
    i=0;

    double deviation;

    for (i>0;i<size;i++)
        sum=sum+pow(Below[i],2);



    deviation=sqrt(sum/size);

    return deviation;
}

string monthName(int month[], const int size,string monthN[])
{
    int i;
    i=0;

    for(i>0;i<size;i++)

            switch(month[i])
    {
        case 1:
            monthN[i]="January";
            break;
        case 2:
            monthN[i]="February";
            break;
        case 3:
            monthN[i]="March";
            break;
        case 4:
            monthN[i]="April";
            break;
        case 5:
            monthN[i]="May";
            break;
        case 6:
            monthN[i]="June";
            break;
        case 7: 
            monthN[i]="July";
                break;
        case 8:
            monthN[i]="August";
                break;
        case 9:
            monthN[i]="September";
            break;
        case 10:
            monthN[i]="October";
            break;
        case 11:
            monthN[i]="November";
            break;
        case 12:
            monthN[i]="December";
            break;
    }

    return monthN[i];
}

[Fbody]

46. for(i>0;i<size;i++)

The first statement in a for loop's header must be an assignment statement, not a relational statement.

[Crutoy]

for(i>0;i<size;i++)

i > 0 , first condition is initialization, since you do comparison it evaluates condition to false and sets i = 0; since 0 is not greater then 0. I assume you meant to do i = 0;

[biogig]

omg of course, thank you so much I don't know what I was thinking lol :)