The document contains a C program that manages a storage system for boxes, allowing users to list, find, add, and randomly select boxes. An error related to C99 compliance is highlighted, specifically regarding variable declaration inside 'for' loops. The program includes various functions for file operations and user interaction through a menu interface.

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;
}