Program to calculate totalMarks, percentage and average of five subj

C Program to calculate total marks, percentage and average of five subjects:

By Ahmad Irshad | Programming Exercises and Solutions > print the result of a student

Write a C program to calculate total marks, percentage and average of five subjects of a student by taking marks as input from user using scanf() fucntion.

Required knowledge for this exercise is: 

Basic Input output, Data Type, Arithmetic operators 

Before writing any program you just imagine about output screen first. For example: what input to be given, and output to be displayed. Let's have a look at the below example: 

INPUT:

Enter secured marks of all subjects: 

40

50

60

70

80

OUTPUT:

Total marks = 300.00

Percentage =  60.00

Average = 60.00

Logic to calculate total marks, percentage and average:

Step by step logic to calculate toatal marks, percenage and average.

1) Print a massage to the user like "Enter secured marks of all subjects:" using printf();

2) Input marks using scanf(); and store it in a variables: arbic, urdu, eng, hindi, and comp.

3) To get total marks sum of all subjects like: totalMarks  = arbic + urdu + eng + hindi + comp

4) To calculate %, use this farmula : percentage = (totalMarks / 500) * 100

5) To calculate average use this farmula : average = totalMarks / 5

6) At last print the values of totalMarks, percentage and average. that's it!

Program to calculate totalMarks, percentage and average of all subjects: 

1. /* C program to calculate totalMarks, percentage and average of all subjects */ #include <stdio.h> int main() { float arabic, urdu, hindi, eng, comp; float totalMarks, average, percentage; /* Input marks of all subjects */ printf("Enter marks of five subjects: \n"); scanf("%f%f%f%f%f", &arabic, &urdu, &hindi, &eng, &comp); /* Calculate totalMarks, average and percentage */ totalMarks = arabic + urdu + hindi + eng + comp; average = totalMarks / 5.0; percentage = (totalMarks / 500.0) * 100; /* Print all results */ printf("Total marks = %.2f\n", totalMarks); printf("Average = %.2f\n", average); printf("Percentage = %.2f", percentage); return 0; }

Output:

1. Enter marks of five subjects:
2. 40
3. 50
4. 60
5. 70
6. 80
7. 
   
8. Total Marks = 300.00

1. Average = 60.00
2. Percentage = 60.00

Note: In above example: Statements scanf("%f%f%f%f%f", &arabic, &urdu, &hindi, &eng, &comp); format specifier %f is used for float data type. 

And statements, printf("Total marks = %.2f\n", totalMarks); %.2f is used to print the number in decimal format upto 2 digits after dot. For Example: 300.00, 60.00 etc. 

Visit to know more about Format specifier.

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