Thread: no match for 'operator<=' in 'qual1

It's far cry from what you had.
And you are dead wrong if all you think that matters is working.
Readability is first and foremost important.
And second is semantically correct, not just something that "works" (it shall not be undefined behavior).

If you fail to follow these principles, then you will become another esbo. A pitiful programmer who is full of bad practices and creates poor, unmaintainable code.

I didn't make the name up.
And yes, that works, if you initialize those variables with something first.

if (qual[0]<=150.0f)
if (qual[1]<=250.0f)
if (qual[2]<=115.0f)
if (qual[3]<=435.0f)
And what you posted is the definition of the array, not the initialization.
The variables must be assigned some value before you test them. If you do that, then yes, it works.

By reading, you are assigning something, yes?

idk i just want it to read it and if it is less print out that part number along with a total .

Code:

#include<iostream>
#include<string>
#include<fstream>

using namespace std;
using std::string;
float total;
char part[4];
float qual[4];
float cost[5];

int main(){
    ifstream file;
  
      file.open("Part.txt");
      
  
if (qual[0]<=150){
                  cout<<"Reorder 200 of part "<<part[0]<<endl;
                                 total=cost[0]*200;
                                      cout<<"Total reorder cost:$"<<total<<endl;}
                                      
if (qual[1]<=250){
                  cout<<"Reorder 300 of part "<<part[1]<<endl;
                                 total=cost[1]*300;
                                 cout<<"Total reorder cost:$"<<total<<endl;}
                                 
if (qual[2]<=115){ 
                   cout<<"Reorder 150 of part "<<part[2]<<endl;
                                  total=cost[2]*150;
                                  cout<<"Total reorder cost:$"<<total<<endl;}
                    
if (qual[3]<=435){
                  cout<<"Reorder 500 of part "<<part[3]<<endl;
                                 total=cost[3]*500;
                                 cout<<"Total reorder cost:$"<<total<<endl;}
                  
if (qual[4]<=250){
                  cout<<"Reorder 750 of part "<<part[4]<<endl;
                                 total=cost[4]*750;
                                 cout<<"Total reorder cost:$"<<total<<endl;}

      
               
 file.close();



system("pause");
return 0;
}

or do you think i should let the other program use the if statement and print it out on the txt file and then i just read that(assuming it prints to the txt file meeting the requirments).

No, let's keep that out of the file.
So read in the data and make it work.
But first, you still haven't fixed the indentation.
And another problem is that you are comparing a float to an integer:
if (qual[3]<=435)
A floating point number is represented with the addition of .0f, so it should be:
if (qual[3]<=435.0f)

Your current code doesn't read anything from the file...

AND for the 5th time from me alon: This is using an element that doesn't exist in qual array:

Code:

if (qual[4]<=250){
                  cout<<"Reorder 750 of part "<<part[4]<<endl;
                                 total=cost[4]*750;
                                 cout<<"Total reorder cost:$"<<total<<endl;}

I would also suggest that you put the end-brace on the line after cout, rather than at the end of that line - it makes it much easier to "find" when you are scanning through the code.

--
Mats