Starter Code:

#include

#include

#include

#include

#define error$($m$,$ c$)$ do$\{$fprintf$($stderr$,"\%$s

$",$ m$)$;exit$($c$)$;$\}$while$(0)$

typedef enum$\{$

NONE $=0,$

CLEAR $=1,$

HEX

SCIENTIFIC

TRUNCATED

$\}$flags;

char$*$ strip$($char $*$ input$)\{$

char$*$ rv $=($char$*)$malloc$($strlen$($input$)+1)$;

int left, right;

for$($left $=0,$ right $=$ strlen$($input$)-1$;

left $$ right && $($input$[$left$]==\text{'}\text{'}||$ input$[$right$]==\text{'}\text{'})$;

$/*$no update$*/)\{$

if$($input$[$left$]==\text{'}\text{'})\{$

left$++$;

$\}$

if$($input$[$right$]==\text{'}\text{'})\{$

right$--$;

$\}$

$\}$

strncpy$($rv$,$ input $+$ left, right$-$left$+1)$;

return rv;

$\}$

int is$\_$double$($char$*)$;

int is$\_$int$($char$*)$;

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

flags flag $=$ NONE;$//$ combination of flags

char in$\_$fmt$[4]="$txt$"$;

char out$\_$fmt$[4]="$csv$"$;

int i $=1$;

while$($argc $!=1)\{$

char$*$ current$\_$arg $=$ argv$[$i$++]$;

if$($current$\_$arg$[0]!=\text{'}-\text{'})$

error$("$fatal error: illegal CLAs", $2)$;

while$(*++$current$\_$arg$)\{$

switch$(*$current$\_$arg$)\{$

case $\text{'}$i$\text{'}$:

if$($strcmp$($argv$[$i$],"$txt$")$ && strcmp$($argv$[$i$],"$csv$"))$

error$("$fatal error: illegal input format", $3)$;

else if$(!$strcmp$($argv$[$i$],"$txt$"))$

strcpy$($in$\_$fmt$,"$txt$")$;

else

strcpy$($in$\_$fmt$,"$csv$")$;

i$++$;argc$--$;

break;

case $\text{'}$o$\text{'}$:

if$($strcmp$($argv$[$i$],"$txt$")$ && strcmp$($argv$[$i$],"$csv$"))$

error$("$fatal error: illegal output format", $4)$;

else if$(!$strcmp$($argv$[$i$],"$txt$"))$

strcpy$($out$\_$fmt$,"$txt$")$;

else

strcpy$($out$\_$fmt$,"$csv$")$;

i$++$;argc$--$;

break;

case $\text{'}$c$\text{'}$:

flag $|=$ CLEAR;$//$flag is an enum XXX$0|0001=$ XXX$1$

break;

case $\text{'}$x$\text{'}$:

flag $|=$ HEX;

break;

case $\text{'}$e$\text{'}$:

flag $|=$ SCIENTIFIC;

break;

case $\text{'}$s$\text{'}$:

flag $|=$ TRUNCATED;

break;

default:

error$("$fatal error: illegal option entered", $5)$;

$\}$

$\}$argc$--$;

$\}$

fprintf$($stderr$,$ "Note: converting $\%$s to $\%$s with options: $",$ in$\_$fmt$,$ out$\_$fmt$)$;

if$($flag & CLEAR$)$

fprintf$($stderr$,"-$c $")$;

if$($flag & HEX$)//$HEX: $2=0010,$ flag: XX$0$X$,$ HEX & flag $=0000$

fprintf$($stderr$,"-$x $")$;

if$($flag & SCIENTIFIC$)$

fprintf$($stderr$,"-$e $")$;

if$($flag & TRUNCATED$)$

fprintf$($stderr$,"-$s $")$;

fprintf$($stderr$,"$

$")$;

char line$[1000]$;

while$($fgets$($line$,1000,$ stdin$))\{$

char$*$ delimiter $=$ strcmp$($in$\_$fmt$,"$csv$")==0?","$: $"\backslash$t$"$;

char$*$ cell;

int ival; double dval;

line$[$strlen$($line$)-1]=\text{'}\backslash 0\text{'}$;

cell $=$ strtok$($line$,$ delimiter$)$;

while$($cell$)\{$

if$($sscanf$($cell$,"\%$d$",$ &ival$)$ && is$\_$int$($cell$))$

printf$("$Integer cell: $\%$d

$",$ ival$)$;

else if$($sscanf$($cell$,"\%$lf$",$ &dval$)$ && is$\_$double$($cell$))$

printf$("$Double cell: $\%$f

$",$ dval$)$;

else

printf$("$String cell: $\%$s

$",$ cell$)$;

cell $=$ strtok$($NULL$,$ delimiter$)$;

$\}$

$\}$

return $0$;

$\}$

int is$\_$int$($char$*$ input$)\{$

if$(*$input $==\text{'}+\text{'}||*$ input $==\text{'}-\text{'})$

input$++$;

while$(*$input$)$

if$(!$isdigit$(*$input$++))$

return $0$;

return $1$;

$\}$

char$*$ tolower$\_$str$($char$*$ input$)\{$

char$*$ rv $=$ strdup$($input$)$;

int i $=0$;

while$(*$input$)$

rv$[$i$++]=$ tolower$(*$input$++)$;

return rv$[$i$]=\text{'}\backslash 0\text{'},$ rv;

$\}$

int is$\_$double$($char$*$ input$)\{$

input $=$ tolower$\_$str$($input$)$;

if$(!$strcmp$($input$,$ "inf"$)||!$strcmp$($input$,$ "nan"$)||$

$!$strcmp$($input$,"-$inf"$))$

return $1$;

if$($strchr$($input$,\text{'}$e$\text{'})!=$ strrchr$($input$,\text{'}$e$\text{'}))$

return $0$;

if$(*$input $==\text{'}+\text{'}||*$ input $==\text{'}-\text{'})$

input$++$;

while$(*$input && $*$input $!=\text{'}.\text{'}$ && $*$input $!=\text{'}$e$\text{'})$

if$(!$isdigit$(*$input$++))$

return $0$;

if$(*$input$++==\text{'}.\text{'})$

while$(*$input && $*$input $!=\text{'}$e$\text{'})$

if$(!$isdigit$(*$input$++))$

return $0$;

if$(*$input$++==\text{'}$e$\text{'})\{$

if$(*$input $==\text{'}+\text{'}||*$ input $==\text{'}-\text{'})$

input$++$;

while$(*$input$)$

if$(!$isdigit$(*$input$++))$

return $0$;

$\}$

return $1$;

$\}$