#include

#include

#include

#define NUMBER$\_$OF$\_$CUSTOMERS $5$

#define NUMBER$\_$OF$\_$RESOURCES $4$

int available$[$NUMBER$\_$OF$\_$RESOURCES$]$;

int maximum$[$NUMBER$\_$OF$\_$CUSTOMERS$][$NUMBER$\_$OF$\_$RESOURCES$]$;

int allocation$[$NUMBER$\_$OF$\_$CUSTOMERS$][$NUMBER$\_$OF$\_$RESOURCES$]$;

int need$[$NUMBER$\_$OF$\_$CUSTOMERS$][$NUMBER$\_$OF$\_$RESOURCES$]$;

int request$\_$resources$($int customer$\_$num, int request$[])$;

void release$\_$resources$($int customer$\_$num, int release$[])$;

void display$\_$state$()$;

void initialize$($char $*$filename$)\{$

FILE $*$fp $=$ fopen$($filename$,"$r$")$;

if $($fp $==$ NULL$)\{$

perror$("$Error opening file"$)$;

exit$($EXIT$\_$FAILURE$)$;

$\}$

for $($int i $=0$; i $$ NUMBER$\_$OF$\_$RESOURCES; i$++)\{$

fscanf$($fp$,"\%$d$,",$ &available$[$i$])$;

$\}$

for $($int i $=0$; i $$ NUMBER$\_$OF$\_$CUSTOMERS; i$++)\{$

for $($int j $=0$; j $$ NUMBER$\_$OF$\_$RESOURCES; j$++)\{$

fscanf$($fp$,"\%$d$,",$ &maximum$[$i$][$j$])$;

allocation$[$i$][$j$]=0$;

need$[$i$][$j$]=$ maximum$[$i$][$j$]$;

$\}$

$\}$

fclose$($fp$)$;

$\}$

int request$\_$resources$($int customer$\_$num, int request$[])\{$

for $($int i $=0$; i $$ NUMBER$\_$OF$\_$RESOURCES; i$++)\{$

if $($request$[$i$]>$ need$[$customer$\_$num$][$i$]||$ request$[$i$]>$ available$[$i$])\{$

return $-1$;

$\}$

$\}$

for $($int i $=0$; i $$ NUMBER$\_$OF$\_$RESOURCES; i$++)\{$

available$[$i$]-=$ request$[$i$]$;

allocation$[$customer$\_$num$][$i$]+=$ request$[$i$]$;

need$[$customer$\_$num$][$i$]-=$ request$[$i$]$;

$\}$

return $0$;

$\}$

void release$\_$resources$($int customer$\_$num, int release$[])\{$

for $($int i $=0$; i $$ NUMBER$\_$OF$\_$RESOURCES; i$++)\{$

available$[$i$]+=$ release$[$i$]$;

allocation$[$customer$\_$num$][$i$]-=$ release$[$i$]$;

need$[$customer$\_$num$][$i$]+=$ release$[$i$]$;

$\}$

$\}$

void display$\_$state$()\{$

printf$("$Current system state:

$")$;

printf$("$Available:

$")$;

for $($int i $=0$; i $$ NUMBER$\_$OF$\_$RESOURCES; i$++)\{$

printf$("\%$d $",$ available$[$i$])$;

$\}$

printf$("$

$")$;

printf$("$Maximum:

$")$;

for $($int i $=0$; i $$ NUMBER$\_$OF$\_$CUSTOMERS; i$++)\{$

printf$("$Customer $\%$d: $[",$ i$)$;

for $($int j $=0$; j $$ NUMBER$\_$OF$\_$RESOURCES; j$++)\{$

printf$("\%$d$",$ maximum$[$i$][$j$])$;

if $($j $$ NUMBER$\_$OF$\_$RESOURCES $-1)\{$

printf$(",")$;

$\}$

$\}$

printf$("]$

$")$;

$\}$

printf$("$Allocation:

$")$;

for $($int i $=0$; i $$ NUMBER$\_$OF$\_$CUSTOMERS; i$++)\{$

printf$("$Customer $\%$d: $[",$ i$)$;

for $($int j $=0$; j $$ NUMBER$\_$OF$\_$RESOURCES; j$++)\{$

printf$("\%$d$",$ allocation$[$i$][$j$])$;

if $($j $$ NUMBER$\_$OF$\_$RESOURCES $-1)\{$

printf$(",")$;

$\}$

$\}$

printf$("]$

$")$;

$\}$

printf$("$Need:

$")$;

for $($int i $=0$; i $$ NUMBER$\_$OF$\_$CUSTOMERS; i$++)\{$

printf$("$Customer $\%$d: $[",$ i$)$;

for $($int j $=0$; j $$ NUMBER$\_$OF$\_$RESOURCES; j$++)\{$

printf$("\%$d$",$ need$[$i$][$j$])$;

if $($j $$ NUMBER$\_$OF$\_$RESOURCES $-1)\{$

printf$(",")$;

$\}$

$\}$

printf$("]$

$")$;

$\}$

$\}$

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

if $($argc $!=2)\{$

fprintf$($stderr$,$ "Usage: $\%$s

$",$ argv$[0])$;

return EXIT$\_$FAILURE;

$\}$

initialize$($argv$[1])$;

printf$("$Welcome to the Banker's Algorithm Simulation

$")$;

char command$[100]$;

int customer$\_$num, request$[$NUMBER$\_$OF$\_$RESOURCES$]$;

while $(1)\{$

printf$("$Please enter commands:

$")$;

printf$("-\text{'}$RQ customer$\_$num resource$\_1$ resource$\_2$ resource$\_3$ resource$\_4\text{'}$ to request resources

$")$;

printf$("-\text{'}$RL customer$\_$num resource$\_1$ resource$\_2$ resource$\_3$ resource$\_4\text{'}$ to release resources

$")$;

printf$("-\text{'}*\text{'}$ to display the current values of the data structures

$")$;

printf$("-$ 'exit' to quit

$")$;

printf$("$Command: $")$;

fgets$($command$,$ sizeof$($command$),$ stdin$)$;

command$[$strcspn$($command$,"$

$")]=0$;

if $($strcmp$($command$,$ "exit"$)==0)\{$

printf$("$Exiting program. Goodbye!

$")$;

break;

$\}$ else if $($strcmp$($command$,"*")==0)\{$

display$\_$state$()$;

$\}$ else if $($strncmp$($command$,"$RQ$",2)==0)\{$

sscanf$($command$,"$RQ $\%$d $\%$d $\%$d $\%$d $\%$d$",$ &customer$\_$num, &request$[0],$ &request$[1],$ &request$[2],$ &request$[3])$;

int result $=$ request$\_$resources$($customer$\_$num, request$)$;

if $($result $==0)\{$

printf$("$Request granted. System is in a safe state.

$")$;

$\}$ else $\{$

printf$("$Request denied. System would be left in an unsafe state.

$")$;

$\}$

$\}$ else if $($strncmp$($command$,"$RL$",2)==0)\{$

sscanf$($command$,"$RL $\%$d $\%$d $\%$d $\%$d $\%$d$",$ &customer$\_$num, &request$[0],$ &request$[1],$ &request$[2],$ &request$[3])$;

release$\_$resources$($customer$\_$num, request$)$;

printf$("$Resources released successfully.

$")$;

$\}$ else $\{$

printf$("$Invalid command. Please try again.

$")$;

$\}$

$\}$

return EXIT$\_$SUCCESS;

$\}$

don't know why my code wont run