Q2: Write a C program called myupper4.c to take as command line input a file name. It should then read the text file, one string at a time and store in a linked list each string. Each new string read from the file should be inserted at the END of the linked list. Each node of the linked list should contain 2 variables: i) a character array to hold a string, ii) a pointer to the next node in the linked list. The myupper4.c file should also contain a function void print_linked_list(struct *node) to iterate over the linked list and print the strings stored in each node of the linked list. Solution #include #include #include #define MAX_LENGTH 512 // buffer size typedef struct node { char data[MAX_LENGTH]; struct node *next; } strNode; int main ( int argc, char *argv[] ) { strNode *head; strNode *current; if ( argc != 2 ) /* argc should be 2 for correct execution */ { /* Assuming argv[0] it is the program name */ printf( \"Error in %s filename\", argv[0] ); exit(); } else { // argv[1] is a filename to open FILE *file = fopen( argv[1], \"r\" ); /* fopen returns 0 on failure */ if ( file == 0 ) { printf( \"Could not open file\ \" ); } else { char str[MAX_LENGTH]; /* read one word at a time from file, stopping at EOF, indicating the end of the file. */ while ( fgets(str,sizeof str,file)!=NULL ) { // check if list is empty if (head == NULL) { head = (strNode*) malloc(sizeof(strNode)); // create head node strcpy(head->data, str); } // if list not empty else { current = head; // start at the beginning while (current->next != NULL) { current = current->next; // traverse to the end of the list } current->next = (strNode*) malloc(sizeof(strNode)); current = current->next; strcpy(current->data, str); display(current); } } fclose( file ); } } return 0; } void display(struct node *disp) { printf(\"%s \", disp->data); if (disp->next == NULL) { return; } display(disp->next); }.

1. Q2: Write a C program called myupper4.c to take as command line input a file name. It should
then read the text file, one string at a time and store in a linked list each string. Each new string
read from the file should be inserted at the END of the linked list. Each node of the linked list
should contain 2 variables: i) a character array to hold a string, ii) a pointer to the next node in
the linked list. The myupper4.c file should also contain a function void print_linked_list(struct
*node) to iterate over the linked list and print the strings stored in each node of the linked list.
Solution
#include
#include
#include
#define MAX_LENGTH 512 // buffer size
typedef struct node
{
char data[MAX_LENGTH];
struct node *next;
} strNode;
int main ( int argc, char *argv[] )
{
strNode *head;
strNode *current;
if ( argc != 2 ) /* argc should be 2 for correct execution */
{
/* Assuming argv[0] it is the program name */
printf( "Error in %s filename", argv[0] );
exit();
}
else
{
// argv[1] is a filename to open
FILE *file = fopen( argv[1], "r" );
/* fopen returns 0 on failure */
if ( file == 0 )

2. {
printf( "Could not open file " );
}
else
{
char str[MAX_LENGTH];
/* read one word at a time from file, stopping at EOF,
indicating the end of the file. */
while ( fgets(str,sizeof str,file)!=NULL )
{
// check if list is empty
if (head == NULL)
{
head = (strNode*) malloc(sizeof(strNode)); // create head node
strcpy(head->data, str);
}
// if list not empty
else
{
current = head; // start at the beginning
while (current->next != NULL)
{
current = current->next; // traverse to the end of the list
}
current->next = (strNode*) malloc(sizeof(strNode));
current = current->next;
strcpy(current->data, str);
display(current);
}
}
fclose( file );
}
}
return 0;
}
void display(struct node *disp)

3. {
printf("%s ", disp->data);
if (disp->next == NULL)
{
return;
}
display(disp->next);
}