You must use pointers for this lab. No arrays, no structures. For example, if yo
ID: 654145 • Letter: Y
Question
You must use pointers for this lab. No arrays, no structures. For example, if you
need an array of floats to hold the scores, do not use float score[15]. Rather use float *score,
then use dynamic memory allocation to hold required memory. You must use memory
optimally, that is if you have only 6 scores, you must point to a memory chunk of
sizeof(float)*6 bytes.
Write a menu based program to maintain student records. Your program should take the following
inputs:
1. Student first name (max. 20 characters)
2. Student last name, (max. 20 characters)
3. Student scores (float/double), eg. 85.4
Your program should be able to take records of a minimum of 5 students. After taking the records,
you should provide 8 functionalities to the user.
1. Print records
Explanation / Answer
#include<stdio.h>
#include<stdlib.h>
#include<conio.h>
int main()
{
char **fname;
char **lname;
char *name;
float *score;
printf("wlecom to Student Records Maintance System ");
printf("Number of records you want to enter(min-3):");
scanf("%d", &noRecords);
fname=(char**)malloc(10*sizeof(*fname));
lname=(char**)malloc(10*sizeof(*lname));
score = (float*)malloc(10*sizeof(float));
for(int i=0;i<noRecords;i++)
{
printf("Enter score of %d student:",i+1);
scanf("%f",&score[i]);
fname[i]=(char*)malloc(20+1);
printf("Enter fname of %d student:",i+1);
scanf("%s",fname[i]);
lname[i]=(char*)malloc(20+1);
printf("Enter lname of %d student:",i+1);
scanf("%s",lname[i]);
}
do
{
printf(" *Print records(Press 1) ");
printf("*Add new records(Press 2) ");
printf("*Delete record(s)(Press 3) ");
printf("*Search by last name(Press 4) ");
printf("*Search by score(Press 5) ");
printf("*Sort by last name(Press 6) ");
printf("*Find median score(Press 7) ");
printf("*Exit the program Print(Press 0) ");
printf("*Enter Your choice:");
scanf("%d",&choice);
switch(choice)
{
case 1:for(int i=0;i<noRecords;i++)
{
printf(" First name: %s Last name: %s Score: %f ",*(fname+i),*(lname+i),*(score+i));
}
break;
case 2:
printf("Enter score of the student %d:",noRecords);
scanf("%f",&score[noRecords]);
fname[noRecords]=(char*)malloc(20+1);
printf("Enter fname the student %d:",noRecords);
scanf("%s",fname+noRecords);
lname[noRecords]=(char*)malloc(20+1);
printf("Enter lname of the student %d:",noRecords);
scanf("%s",lname+noRecords);
noRecords++;
break;
case 3: printf("Enter the last name of the student:");
name=(char*)malloc(20+1);
scanf("%s",name);
for(int i=0;i<noRecords;i++)
{
if(name==lname[i])
{
free(lname[i]);
free(fname[i]);
free(score[i]);
}
}
break;
case 0:printf("exiting..");exit(0); break;
default: printf(" Invalid choice ");
}
}while(1);
}
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