Write a C++ program to Show grades with marks percentage.
#include <iostream>
using namespace std;
int main() {
float marks;
float percentage;
// Prompt the user to enter marks
cout << "Enter total marks obtained: ";
cin >> marks;
// Calculate percentage
percentage = (marks / 100) * 100; // Assuming total marks are 100 for simplicity
// Determine grade based on percentage
switch (static_cast<int>(percentage / 10)) {
case 10: // For 100%
case 9:
cout << "Grade: A+" << endl;
break;
case 8:
cout << "Grade: A" << endl;
break;
case 7:
cout << "Grade: B" << endl;
break;
case 6:
cout << "Grade: C" << endl;
break;
case 5:
cout << "Grade: D" << endl;
break;
case 4:
cout << "Grade: E" << endl;
break;
default:
cout << "Grade: F" << endl; // For marks below 40
break;
}
return 0;
}
Example of all possible Outputs:
Example Output #1
Enter total marks obtained:
85
Grade: A
Example Output #2
Enter total marks obtained:
95
Grade: A+
Example Output #3
Enter total marks obtained:
70
Grade: B
Example Output #4
Enter total marks obtained:
60
Grade: C
Example Output #5
Enter total marks obtained:
45
Grade: D
Example Output #6
Enter total marks obtained:
30
Grade: F
Example#2
Let us see the C++ program to Calculate the percentage of marks and show grade using the switch statements. Percentage >= 90% : Grade A
Percentage >= 80% : Grade B
Percentage >= 70% : Grade C
Percentage >= 60% : Grade D
Percentage >= 40% : Grade E
Percentage < 40% : Grade F
Flowchart of the program to Calculate the percentage of marks and show the grade
Program in C++ to Calculate the percentage of marks and show the grade
# include <iostream>
# include <conio.h>
using namespace std;
int main()
{
int s1,s2,s3,s4,s5;
float per;
char grade;
cout<<"enter marks of five subjects"<<endl;
cin>>s1>>s2>>s3>>s4>>s5;
per=((s1+s2+s3+s4+s5)*100)/500;
cout<<per<<endl;
switch (per>=90&&per<100)
{
case 1:
cout<<"your grade is A";
break;
case 0:
switch(per>=80 &&per<90)
{
case 1:
cout<<"grade is B";
break;
case 0:
switch(per>=70&&per<80)
{
case 1:
cout<<"your grade is C";
break;
case 0:
switch (per>=60&&per<70)
{
case 1:
cout<<"grade is D";
break;
case 0:
switch (per>=50&&per<60)
{
case 1:
cout<<"grade is E";
break;
case 0:
cout<<"grade is F";
break;
}
break;
}
break;
}
break;
}
break;
}
}
Output
SFT (Shamil’s Flow Table )
Are you interested to Read about SFT(Shamil’s Flow Table)?
C++ Program to input marks of subjects and show percentage, and grade without a switch statement
T| Click Here Read More about this Shamil’s Memory Table of grade program |
C++ program to find percentage of marks and show grade using if else statements
// C++ Program to Calculate Sum of 5 Subjects and Find Percentage and Grade
#include <bits/stdc++.h>
using namespace std;
int main() {
// To store the values of five subjects
float Subject1, Subject2, Subject3, Subject4;
float Total_Marks = 0.00, Average_Marks = 0.00, percentage = 0.00;
char grade;
cout << "Enter the marks of four subjects::\n";
cin >> Subject1 >> Subject2 >> Subject3 >> Subject4;
// It will calculate the Total_Marks, Average_Marks and Percentage
Total_Marks = Subject1 + Subject2 + Subject3 + Subject4;
Average_Marks = Total_Marks / 4.0;
percentage = (Total_Marks / 400.0) * 100;
// It will calculate the Grade
if (Average_Marks >= 90)
grade = 'A';
else if (Average_Marks >= 80 && Average_Marks < 90)
grade = 'B';
else if (Average_Marks >= 70 && Average_Marks < 80)
grade = 'C';
else if (Average_Marks >= 60 && Average_Marks < 70)
grade = 'D';
else
grade = 'E';
// It will produce the final output
cout << "\n The Total_Marks marks = " << Total_Marks << "/400\n";
cout << "The Average_Marks marks = " << Average_Marks << "\n";
cout << "The Percentage = " << percentage << "%\n";
cout << "The Grade = '" << grade << "'\n";
return 0;
}
Output
Enter the marks of four subjects::
50
60
60
50
The Total_Marks marks = 220/400
The Average_Marks marks = 55
The Percentage = 55%
The Grade = ‘E’
——————————–
C++ program to find percentage of marks and show grade using Nested if else statements
// C++ Program to Find Student_Grade of a Student using Nested If-else
#include <bits/stdc++.h>
using namespace std;
int main() {
// To store the values of five subjects
float Subject1, Subject2, Subject3, Subject4;
float Total_Marks = 0.00, Average_Marks = 0.00, percentage = 0.00;
char Student_Grade;
cout << "Enter the marks of five subjects::\n";
cin >> Subject1 >> Subject2 >> Subject3 >> Subject4;
// It will calculate the Total_Marks, Average_Marks and Percentage
Total_Marks = Subject1 + Subject2 + Subject3 + Subject4;
Average_Marks = Total_Marks / 4.0;
percentage = (Total_Marks / 400.0) * 100;
// It will calculate the Student_Grade
if (Average_Marks >= 90) {
Student_Grade = 'A';
}
else {
if (Average_Marks >= 80 && Average_Marks < 90) {
Student_Grade = 'B';
}
else {
if (Average_Marks >= 70 && Average_Marks < 80) {
Student_Grade = 'C';
}
else {
if (Average_Marks >= 60 && Average_Marks < 70) {
Student_Grade = 'D';
}
else {
Student_Grade = 'E';
}
}
}
}
// It will produce the final output
cout << "\nThe Total_Marks marks = " << Total_Marks << "/400\n";
cout << "The Average_Marks marks = " << Average_Marks << "\n";
cout << "The Percentage = " << percentage << "%\n";
cout << "The Student_Grade = '" << Student_Grade << "'\n";
return 0;
}
Output
Enter the marks of four subjects::
40
40
60
60
The Total_Marks marks = 200/400
The Average_Marks marks = 50
The Percentage = 50%
The Student_Grade = ‘E’
——————————–
C++ program to find percentage of marks and show grade using User define function
// C++ Program to Find Grade of a Student using Function
#include <bits/stdc++.h>
using namespace std;
// This function will display the percentage, Marks_Average, and grade
void CalcPercentGrade(float Subject1, float Subject2, float Subject3, float Subject4) {
float Total_Marks = 0.00, Marks_Average = 0.00, percentage = 0.00;
char grade;
// It will calculate the Total_Marks, Marks_Average and Percentage
Total_Marks = Subject1 + Subject2 + Subject3 + Subject4;
Marks_Average = Total_Marks / 4.0;
percentage = (Total_Marks / 400.0) * 100;
// It will calculate the Grade
if (Marks_Average >= 90)
grade = 'A';
else if (Marks_Average >= 80 && Marks_Average < 90)
grade = 'B';
else if (Marks_Average >= 70 && Marks_Average < 80)
grade = 'C';
else if (Marks_Average >= 60 && Marks_Average < 70)
grade = 'D';
else
grade = 'E';
// It will produce the final output
cout << "\nThe Total_Marks marks = " << Total_Marks << "/400\n";
cout << "The Marks_Average marks = " << Marks_Average << "\n";
cout << "The Percentage = " << percentage << "%\n";
cout << "The Grade = '" << grade << "'\n";
}
// It's the driver function
int main() {
// To store the values of four subjects
float Subject1, Subject2, Subject3, Subject4;
cout << "Enter the marks of four subjects::\n";
cin >> Subject1 >> Subject2 >> Subject3 >> Subject4;
// It will produce the final output
CalcPercentGrade(Subject1, Subject2, Subject3, Subject4);
return 0;
}
Output
Enter the marks of four subjects::
40
40
60
60
The Total_Marks marks = 200/400
The Average_Marks marks = 50
The Percentage = 50%
The Student_Grade = ‘E’