Given the exponential function y = (0.5)^x: a. Complete Table 2. Table 2: End behavior of y = (0.5)x b. As x rightarrow infinity, (0.5)^x rightarrow c. As x rightarrow -infinity, (0.5)^x rightarrow Solution b. As x tends to infinity, (0.5)^x = (1/2)^infinity = 1/(2^infinity) approaches to zero. Hence answer is 0 c. As x tends to - infinity, (0.5)^x = (1/2)^(-infinity) = 2^infinity approaches to infinity Hence answer is infinity..

1. HERE is a C PROGRAM BELOW: EVERYTIME I TRY TO RUN IT ON MATRIX IT GIVES
ME " error: ‘for’ loop initial declarations are only allowed in C99 mode" ERROR. PLEASE
HELP ME TO FIX THIS ERROR (I do not want to run with -std=c99 ,want to edit my program)
#include
#include
struct Box {
int id;
double size[3];
double weight;
};
void listBoxes(const char filename[]);
void printBox(struct Box b);
int searchBox(FILE *fp, int id2Find);
void displayBox(const char filename[], int id2Find);
int addBox(const char filename[], const struct Box * b2Add);
int numberBoxes(const char filename[]); // number of boxes in a file
int getRandomInt(int lower, int higher);
void displayBoxN(char filename[], int n); // displaying a box and it's given its record number
void listBoxes(const char filename[])
{
FILE *fp = NULL;
int a;
double b, c, d, e;
printf("List of boxes ");
printf("============= ");
printf("ID Length Width Height Weight ");
printf("----------------------------- ");
fp = fopen("storage.txt", "r");
if (fp != NULL)
{
for (int i = 1; i <= 5; i++)
{
fscanf(fp, "%d %lf %lf %lf %lf", &a, &b, &c, &d, &e);
printf(" %2d %6.2lf %5.2lf %6.2lf %6.2lf", a, b, c, d, e);

2. }
printf(" ");
fclose(fp);
}
else
{
printf("Error ");
}
}
int searchBox(FILE *fp, int id2Find)
{
int a;
double b, c, d, e;
if (fp == NULL)
{
return -1;
}
else
{
rewind(fp);
for (int i = 1; i < 5; i++)
{
fscanf(fp, "%d %lf %lf %lf %lf", &a, &b, &c, &d, &e);
if (id2Find == a)
{
return i;
}
}
return -1;
}
}
void displayBox(const char filename[], int id2Find)
{
FILE *fp = NULL;
struct Box b;
int a = 0;

3. fp = fopen(filename, "r");
if (fp != NULL)
{
if (a == -1)
{
printf("This box is not recorded. ");
}
else
{
a = searchBox(fp, id2Find);
printf("Found box %d as record #%d: ", id2Find, a);
rewind(fp);
for (int i = 0; i < a; i++) {
fscanf(fp, "%d %lf %lf %lf %lf ", &b.id, &b.size[0], &b.size[1], &b.size[2],
&b.weight);
}
printBox(b);
}
}
else
{
printf("Fail");
}
fclose(fp);
}
void displayRandomBox(const char filename[])
{
FILE *fp = NULL;
struct Box b;
int a = 0;
fp = fopen(filename, "r");
int id2Find=rand() % (5 + 1 - 1) + 1;
if (fp != NULL)
{
a = searchBox(fp, id2Find);

4. rewind(fp);
for (int i = 0; i < a; i++)
{
fscanf(fp, "%d %lf %lf %lf %lf ", &b.id, &b.size[0], &b.size[1], &b.size[2],
&b.weight);
}
printBox(b);
}
else
{
printf("Fail");
}
fclose(fp);
}
void printBox(struct Box b) {
printf(" ID: %6d "
"Length: %6.2lf "
"Width: %6.2lf "
"Height: %6.2lf "
"Weight: %6.2lf ", b.id, b.size[0], b.size[1], b.size[2], b.weight);
}
int addBox(const char filename[], const struct Box * b2Add)
{
FILE *fp = NULL;
fp = fopen(filename, "a");
struct Box box;
box = *b2Add;
int c = 0;
if (fp == NULL)
{
printf("Error ");
return 1;
}
else
{
int a = box.id;

5. int b = searchBox(fp, a);
if (b != -1)
{
printf("A box with this ID is already recorded. ");
}
else
{
fprintf(fp, " %d %lf %lf %lf %lf", box.id, box.size[0], box.size[1], box.size[2],
box.weight);
c = 1;
}
fclose(fp);
}
return c;
}
int menu(void) {
int select = -1;
printf("1- List all boxes ");
printf("2- Find a box ");
printf("3- Add a box ");
printf("4- Randomly pick a lucky box! ");
printf("0- Exit program ");
printf("Select an option: ");
do {
scanf("%d", &select);
if (select < 0 || select > 4)
printf("Please enter a number between 0 and 4: ");
} while (select < 0 || select > 4);
return select;
}
int main(void) {
int choice, boxID, a;
char filename[] = "storage.txt";
struct Box b;
printf("Welcome to My Storage Room ");

6. printf("========================== ");
do {
choice = menu();
switch (choice) {
case 1:
listBoxes(filename);
break;
case 2:
printf("Enter box ID: ");
scanf("%d", &boxID);
displayBox(filename, boxID);
break;
case 3:
printf("Please enter the box's ID, length, width, height and weight: ");
scanf("%d %lf %lf %lf %lf", &b.id, &b.size[0], &b.size[1], &b.size[2], &b.weight);
a = addBox(filename, &b);
printf("%d box added to storage! ", a);
break;
case 4:
displayRandomBox(filename);
break;
};
} while (choice > 0);
return 0;
}
Solution
/*
in for loop you can't declare int directly.
for(int i=0;i wrong

7. int i;
for(i=0;i
#include
struct Box {
int id;
double size[3];
double weight;
};
void listBoxes(const char filename[]);
void printBox(struct Box b);
int searchBox(FILE *fp, int id2Find);
void displayBox(const char filename[], int id2Find);
int addBox(const char filename[], const struct Box * b2Add);
int numberBoxes(const char filename[]); // number of boxes in a file
int getRandomInt(int lower, int higher);
void displayBoxN(char filename[], int n); // displaying a box and it's given its record number
void listBoxes(const char filename[])
{
FILE *fp = NULL;
int a;
int i;
double b, c, d, e;
printf("List of boxes ");
printf("============= ");
printf("ID Length Width Height Weight ");
printf("----------------------------- ");
fp = fopen("storage.txt", "r");
if (fp != NULL)
{
for (i = 1; i <= 5; i++)
{
fscanf(fp, "%d %lf %lf %lf %lf", &a, &b, &c, &d, &e);
printf(" %2d %6.2lf %5.2lf %6.2lf %6.2lf", a, b, c, d, e);
}
printf(" ");

8. fclose(fp);
}
else
{
printf("Error ");
}
}
int searchBox(FILE *fp, int id2Find)
{
int a,i;
double b, c, d, e;
if (fp == NULL)
{
return -1;
}
else
{
rewind(fp);
for (i = 1; i < 5; i++)
{
fscanf(fp, "%d %lf %lf %lf %lf", &a, &b, &c, &d, &e);
if (id2Find == a)
{
return i;
}
}
return -1;
}
}
void displayBox(const char filename[], int id2Find)
{
FILE *fp = NULL;
struct Box b;
int a = 0,i;
fp = fopen(filename, "r");
if (fp != NULL)

9. {
if (a == -1)
{
printf("This box is not recorded. ");
}
else
{
a = searchBox(fp, id2Find);
printf("Found box %d as record #%d: ", id2Find, a);
rewind(fp);
for (i = 0; i < a; i++) {
fscanf(fp, "%d %lf %lf %lf %lf ", &b.id, &b.size[0], &b.size[1], &b.size[2], &b.weight);
}
printBox(b);
}
}
else
{
printf("Fail");
}
fclose(fp);
}
void displayRandomBox(const char filename[])
{
FILE *fp = NULL;
struct Box b;
int a = 0,i;
fp = fopen(filename, "r");
int id2Find=rand() % (5 + 1 - 1) + 1;
if (fp != NULL)
{
a = searchBox(fp, id2Find);
rewind(fp);
for (i = 0; i < a; i++)
{
fscanf(fp, "%d %lf %lf %lf %lf ", &b.id, &b.size[0], &b.size[1], &b.size[2], &b.weight);

10. }
printBox(b);
}
else
{
printf("Fail");
}
fclose(fp);
}
void printBox(struct Box b) {
printf(" ID: %6d "
"Length: %6.2lf "
"Width: %6.2lf "
"Height: %6.2lf "
"Weight: %6.2lf ", b.id, b.size[0], b.size[1], b.size[2], b.weight);
}
int addBox(const char filename[], const struct Box * b2Add)
{
FILE *fp = NULL;
fp = fopen(filename, "a");
struct Box box;
box = *b2Add;
int c = 0;
if (fp == NULL)
{
printf("Error ");
return 1;
}
else
{
int a = box.id;
int b = searchBox(fp, a);
if (b != -1)
{
printf("A box with this ID is already recorded. ");
}

11. else
{
fprintf(fp, " %d %lf %lf %lf %lf", box.id, box.size[0], box.size[1], box.size[2], box.weight);
c = 1;
}
fclose(fp);
}
return c;
}
int menu(void) {
int select = -1;
printf("1- List all boxes ");
printf("2- Find a box ");
printf("3- Add a box ");
printf("4- Randomly pick a lucky box! ");
printf("0- Exit program ");
printf("Select an option: ");
do {
scanf("%d", &select);
if (select < 0 || select > 4)
printf("Please enter a number between 0 and 4: ");
} while (select < 0 || select > 4);
return select;
}
int main(void) {
int choice, boxID, a;
char filename[] = "storage.txt";
struct Box b;
printf("Welcome to My Storage Room ");
printf("========================== ");
do {
choice = menu();
switch (choice) {
case 1:
listBoxes(filename);

12. break;
case 2:
printf("Enter box ID: ");
scanf("%d", &boxID);
displayBox(filename, boxID);
break;
case 3:
printf("Please enter the box's ID, length, width, height and weight: ");
scanf("%d %lf %lf %lf %lf", &b.id, &b.size[0], &b.size[1], &b.size[2], &b.weight);
a = addBox(filename, &b);
printf("%d box added to storage! ", a);
break;
case 4:
displayRandomBox(filename);
break;
};
} while (choice > 0);
return 0;
}