Group of simple programs written in C + + programming language

1-Program to calculate the student assessment, where estimates are given as:

        90 ≤ 'A' ≤ 100

        80 ≤ 'B' < 90

        70 ≤ 'C' < 80

        60 ≤ 'D' < 70

                 'F' < 60

#include <iostream.h>

#include <conio.h>

void main ( )

{

float mark ;

char grade ;

L: cout << "Enter a mark : " ;

cin >> mark ;

if (mark > 100 || mark < 0)

cout << "rong mark .. try again " ;

else if (mark >= 90)

grade = 'A' ;

else if (mark >= 80)

grade = 'B' ;

else if (mark >= 70)

grade = 'C' ;

else if (mark >= 60)

grade = 'D' ;

else

grade = 'F' ;

cout << grade << endl ;

goto L;

getch ();

}

2-Program to print the sum of  Forums numbers located between 1 and 100:

#include <iostream.h>

#include <conio.h>

void main ()

{

int i, sum = 0;

for (i = 100; i > 1; i=i-2)

sum += i;

cout << " SUM = " << sum << endl ;

getch ();

}

3-Program, will enter the numbers and print them as long as did not enter the number 0 :

#include <iostream.h>

#include <conio.h>

void main ()

{

int n;

while ( n != 0 )

{

cout << "Enter a number: ";

cin >> n;

cout << "n= " << n << endl ;

}

getch ();

}