Question

Write C program

Multidimensional Arrays

Design a program which uses two two-dimensional arrays as follows:

• an array which can store up to 50 student names where a name is up to 25 characters long
• an array which can store marks for 5 courses for up to 50 students

The program should first obtain student names and their corresponding marks for a requested number of students from the user. Please note that the program should reject any number of students that is requested by the user which is greater than 50. The program will compute the average mark for each course and then display all students and their marks, as well as the average mark for each course.

A sample output produced by the program is shown below, if assumed that the user entered marks for 4 students. Please note that the computation of the average mark for each course should use type casting.

       Student                      PRG   DGS   MTH   ECR   GED

       Ann Smart                  93       85       87       83       90

       Mike Lazy                   65       57       61       58       68

       Yo Yo                         78       65       69       72       75

       Ma Ma                        84       79       83       81       83

       AVERAGE                80.0    71.5    75.0    73.5    79.0

It is required to submit your source code file, i.e. Lab5.c file as well as a file with your program's run screen captures

Answer 1

Code:

#include <stdio.h>
int main()
{
    int number_of_students;
    // taking input from user
    printf("Enter the number of students\n");
    scanf("%d",&number_of_students);
    // creating a two dimensional array for 50 students where a name is up to 25 characters long
    char names[50][25];
    // creating a two dimensional array which can store marks for 5 courses for up to 50 students
    int marks[50][5];
    int i, j;
    // taking input from user
    for(i=0; i<number_of_students; i++) {
        printf("Enter the name of student %d\n",i+1);
        scanf(" %[^\n]",names[i]);
        printf("Enter the marks of the student %s\n",names[i]);
        for(j=0;j<5;j++){
            scanf("%d",&marks[i][j]);
        }
    }
    // printing the output
    printf("%-25s%-7s%-7s%-7s%-7s%-7s\n","Student","PRG","DGS","MTH","ECR","GED");
    for(i=0; i<number_of_students; i++) {
        printf("%-25s",names[i]);
        for(j=0;j<5;j++){
            printf("%-7d",marks[i][j]);
        }
        printf("\n")  ;
    }
   printf("%-25s","AVERAGE");
   j=0;
   // calculating the average of the marks for each course
   while(j<5){
       int sum =0;
       double avg=0;
       for(int i=0;i<number_of_students;i++){
           sum=sum+marks[i][j];
       }
       // type casting the average
       avg=(double)sum/number_of_students;
       printf("%.1f%-3s",avg," ");
       j++;
   }
   return 0;
}

Screenshot of the code:

Screenshot of the output: