CSE 1310 Files

In this assignment, you will write two different programs, so you will need two different file. They will be named abc1234_HW8_1.c and abc1234_HW8_2.c. Both will have everything done in main.

In file abc1234_HW_1.c:

You will be creating and saving a grade book to a file. This will do the following:

• Ask the user for the number of students and store it
• Ask the user for the number of grades per student and store it
• Create arrays to hold student id numbers and grades
• For each student, ask the user for that student's student id and store them
• For each grade for each student, ask the user for that student's grade and store them
• Create and open a file where the student ids and names to a stored titled "abc1234_grades.txt"
• On the first row, write the number of students.
• On the second row, write the number of grades.
• For each row after, use the following format:
  • Student_id grade1 grade2 grade3 grade4 ... grade n average (2 decimal places)
• Close the file

In file abc_1234_HW8_2:

This will be the receipt problem from HW7, except all prices and codes will be stored in a file. You will need to do the following:

• Get the name of the file from the command line arguments.
• Open the file
• Read in the first value, representing how many items there are in the list.
• Create your item code array
• Create your price array
• Read in the codes and prices into their arrays.
• Close the file
• Assume the user is going to check out 10 items
• For each item
  • Ask the user to enter the item code (assume user is only going to enter item codes from the list)
  • Find the corresponding price in the array.
  • Store these values in the arrays to generate the receipt
• Print out the receipt, just like in homework 7.
• If item is not in the list, ask for the price, update the arrays and the file to include the added item

CS131_HW8_data1.txt

10
1345 22.35
1351 44.56
533 458.00
147 55.29
14 4.00
342 9.24
24 8.88
2829 92.50
219 0.25
3278 4.58

CSE1310_HW8_data2.txt

15
1345 22.35
1351 44.56
533 458.00
147 55.29
14 4.00
342 9.24
24 8.88
2829 92.50
219 0.25
3278 4.58
785 20.00
888 42.89
5 9.99
25 8.78
62 150.00

nxt2364_HW7.c

#include < stdbool.h >
#include < stdio.h >
#include < stdio.h >


// A.
bool checkDuplicates(int arr[], int n, int k)
{

for (int i = 0; i < n; i++) {
int j = i + 1;
int range = k;

while (range > 0 && j < n) {
if (arr[i] == arr[j])
return true;
j++;
range--;
}
}
return false;
}



// B.
void white_black(int pixels[][5], int rows){
int r, c;
for(r=0; r<5; r++){
for(c=0; c<5; c++){
pixels[r][c] = 255 - pixels[r][c];
}
}

for(r=0; r<5; r++){
for(c=0; c<5; c++){
printf("%4d",pixels[r][c]);
}
printf("\n");
}
}

int main()
{

// A.
int arr[10];

for(int i = 0; i< 10; ++i) {
printf("Input number %d:",i+1);
scanf("%d", &arr[i]);
}

int n = sizeof(arr) / sizeof(arr[0]);
if (checkDuplicates(arr, n, 3))
printf("There are duplicate values \n");
else
printf("There are not duplicate values \n");

printf("----------- \n");

// B.

int pix[5][5] = {
{183, 226, 180, 117, 222},
{193, 188, 0, 124, 52},
{46, 157, 214, 49, 246},
{1, 78, 167, 143, 204},
{98, 175, 159, 152, 248}
};

white_black(pix,5);
printf("----------- \n");


// C.
int UPC[10];
float price[10];
float Total=0;

for(int i = 0; i<10; ++i) {
printf("Enter UPC #%d:",i+1);
scanf("%d", &UPC[i]);

printf("Enter price #%d:",i+1);
scanf("%f", &price[i]);
Total = Total + price[i];
}

printf("Item ");
printf("Code ");
printf("Price \n");

for(int i=0; i<10; i++) {
printf("%d ",UPC[i]);
printf(" ");
printf("%.2f ",price[i]);
printf("\n");
}

printf("Total ");
printf(" ");
printf("%.2f ",Total);
}