YOU NEED TO Use C program to create a hexadecimal calculator to do the equality and addition

The Code you need to add things to run!!!

#include

#include

#include

#include

#define INT_SIZE 101 /* max number of digits (and sign) per integer value */

#define LINE_LEN 106 /* maximum length of any input line */

#define NUM_VARS 10 /* number of different variables */

#define BASE_HEX 16 /* base of hexadecimal system */

#define CH_ZERO '0' /* character 0 */

#define POS_SGN '+' /* sign for positive number */

#define NEG_SGN '-' /* sign for negative number */

#define ASN_OP '=' /* addition operator */

#define ECH_OP '?' /* addition operator */

#define ADD_OP '+' /* addition operator */

#define SUB_OP '-' /* addition operator */

#define MUL_OP '*' /* addition operator */

#define EXIT_CMD \"exit\" /* command to exit */

#define PROMPT \"> \" /* command prompt */

#define HEXA \"0x\" /* hexadecimal prefix */

#define CMT_FLAG '%' /* indicator for comment line */

/* add your own defined constants here */

typedef char longhex_t[INT_SIZE]; /* one large hexadecimal \"variable\" */

/****************************************************************/

/* function prototypes */

void read_line(char *line, int max_len);

void init(longhex_t vars[], int lens[]);

void echo(longhex_t var, int len);

void assign(longhex_t vars[], int lens[], int index, char *parameter);

void add(longhex_t vars[], int lens[], int index, char *parameter);

void subtract(longhex_t vars[], int lens[], int index, char *parameter);

void multiply(longhex_t vars[], int lens[], int index, char *parameter);

/* add your own function prototypes here */

/****************************************************************/

/* main program controls all the action */

int

main(int argc, char *argv[]) {

/* DO NOT CHANGE THE MAIN FUNCTION */

char line[LINE_LEN+1]; /* to hold the input line */

longhex_t vars[NUM_VARS]; /* to hold 10 large hexadecimal integers */

int lens[NUM_VARS]; /* to hold the length of the 10 vars */

int index; /* index of the first variable in command */

char op; /* operator in command */

init(vars, lens);

while (1) {

printf(PROMPT); /* print prompt */

read_line(line, LINE_LEN); /* read one line of command */

if (line[0] == CMT_FLAG) { /* print comment in the test data */

printf(\"%s \", line); /* used to simplify marking */

continue;

}

if (strcmp(line, EXIT_CMD) == 0) { /* see if command is \"exit\" */

return 0;

}

index = line[1] - CH_ZERO; /* first var number at line[1] */

op = line[2]; /* operator at line[2] */

if (op == ECH_OP) { /* print out the variable */

echo(vars[index], lens[index]);

continue;

}

/* do the calculation, second operand starts at line[3] */

if (op == ASN_OP) {

assign(vars, lens, index, line+3);

} else if (op == ADD_OP) {

add(vars, lens, index, line+3);

}

}

/* all done; take some rest */

return 0;

}

/* read a line of input into the array passed as argument;

* no need to change this function.

*/

void

read_line(char *line, int max_len) {

int i = 0, c;

while (((c = getchar()) != EOF) && (c != ' ') && (c != ' ')) {

if (i

line[i++] = c;

} else {

printf(\"Invalid input line, toooooooo long. \");

exit(0);

}

}

line[i] = '\\0';

}

/* print out a large hexadecimal integer;

* no need to change this function,

* unless you changed the hexadecimal representation.

*/

void

echo(longhex_t var, int len) {

int i;

/* print sign */

if (var[0] == NEG_SGN) {

printf(\"%c\", NEG_SGN);

}

/* print \"0x\" prefix */

printf(HEXA);

/* print the digits in a reverse order */

for (i = len; i > 0; i--) {

putchar(var[i]);

}

printf(\" \");

}

/****************************************************************/

/* set the vars array to all zero values */

void

init(longhex_t vars[], int lens[]) {

/* add your code here */

}

/* process the '=' operator */

void

assign(longhex_t vars[], int lens[], int index, char *parameter) {

/* add your code here */

}

/* process the '+' operator */

void

add(longhex_t vars[], int lens[], int index, char *parameter) {

/* add your code here */

}