WAP to read the mark obtained by a student in any subject(out of 100) and calculate the grade based on the following criteria:

Question

1.00/5 (1 vote)

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i tried the program
when i compile it displays:0 errors
but, i'm not getting the 'grade' as A,B or C....it was just blank space
i dont understand could someone explain?
also:where shld i add clrscr();

What I have tried:

#include<iostream.h>
#include<conio.h>
void main()
{
float mark;
char grade,A,B,C;
cout<<"Enter mark"<<endl;
cin>>mark;
clrscr();
{
if(mark>69)
  grade=A;
else if(mark>39)
  grade=B;
else if(mark>=0)
  grade=C;
  }
cout<<"Grade:"<<grade<<endl;
}

Posted 4-Aug-18 0:34am

Tiya judit

Updated 4-Aug-18 5:51am

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Comments

Richard MacCutchan 4-Aug-18 7:15am

"when i compile it displays:0 errors"
Well we cannot guess what those errors are. If you want some help then please provide full details of any error messages and where they occur.

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Richard MacCutchan · Answer 1 · 2018-08-04T01:18:00

C++

char grade,A,B,C;
cout<<"Enter mark"<<endl;
cin>>mark;
clrscr();
{
if(mark>69)
  grade=A;

You have not initialised A,B or C to any values so what you may display will be garbage. Your code should use actual character constants rather than variables, for example:

C++

char grade = 'Z'; // if no grade received
cout<<"Enter mark"<<endl;
cin>>mark;
clrscr();
{
if(mark>69)
  grade='A';

... etc.

Patrice T · Answer 2 · 2018-08-04T05:51:00

Your code do not behave the way you expect, or you don't understand why !

There is an almost universal solution: Run your code on debugger step by step, inspect variables.
The debugger is here to show you what your code is doing and your task is to compare with what it should do.
There is no magic in the debugger, it don't know what your is supposed to do, it don't find bugs, it just help you to by showing you what is going on. When the code don't do what is expected, you are close to a bug.
To see what your code is doing: Just set a breakpoint and see your code performing, the debugger allow you to execute lines 1 by 1 and to inspect variables as it execute.

The downside of this solution:
- It is a DIY, you are the one tracking the problem and finding its roots, which lead to the solution.
The upside of this solution:
- It is also a great learning tool because it show you reality and you can see which expectation match reality.

secondary effects
- Your will be proud of finding bugs yourself.
- Your learning skills will improve.

You should find pretty quickly what is wrong.

Debugger - Wikipedia, the free encyclopedia[^]

Mastering Debugging in Visual Studio 2010 - A Beginner's Guide[^]
Basic Debugging with Visual Studio 2010 - YouTube[^]
1.11 — Debugging your program (stepping and breakpoints) | Learn C++[^]
The debugger is here to only show you what your code is doing and your task is to compare with what it should do.

WAP to read the mark obtained by a student in any subject(out of 100) and calculate the grade based on the following criteria:

2 solutions

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Solution 2

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