$//$ Compile with: gcc $-$no$-$pie $-$g $-$Wl$,-$z$,$norelro $-$fno$-$stack$-$protector $-$U$\_$FORTIFY$\_$SOURCE $-$o heap$2$ heap$2.$c #include #include #include #define NAME$\_$LENGTH $20$ #define INPUT$\_$LENGTH $20$ int main$($int argc, char $*$argv$[])\{$ char input$[$INPUT$\_$LENGTH$],*$pres$,*$vp$,*$jan; int choice$=0$; while $($choice $!=99)\{$ printf$("**$ MENU $**$

$")$; printf$("[1]$ Allocate memory for president's name.

$")$; printf$("[2]$ Input president's name.

$")$; printf$("[3]$ Display president's name.

$")$; printf$("[4]$ Free memory for president's name.

$")$; printf$("[5]$ Allocate memory for vice president's name.

$")$; printf$("[6]$ Input vice president's name.

$")$; printf$("[7]$ Display vice president's name.

$")$; printf$("[8]$ Free memory for vice president's name.

$")$; printf$("[9]$ Allocate memory for janitor's name.

$")$; printf$("[10]$ Input janitor's name.

$")$; printf$("[11]$ Display janitor's name.

$")$; printf$("[12]$ Free memory for janitor's name.

$")$; printf$("[99]$ QUIT

$")$; fgets$($input$,$ INPUT$\_$LENGTH$-1,$ stdin$)$; choice$=$atoi$($input$)$; switch $($choice$)\{$ case $1$: pres$=$malloc$($NAME$\_$LENGTH$)$; break; case $2$: printf$("$Enter president's name: $")$; fflush$($stdin$)$; fgets$($pres$,$ NAME$\_$LENGTH$-1,$ stdin$)$; break; case $3$: printf$("$President$\text{'}$s name: $\%$s

$",$ pres$)$; break; case $4$: free$($pres$)$; break; case $5$: vp$=$malloc$($NAME$\_$LENGTH$)$; break; case $6$: printf$("$Enter vice president's name: $")$; fflush$($stdin$)$; fgets$($vp$,$ NAME$\_$LENGTH$-1,$ stdin$)$; break; case $7$: printf$("$Vice president's name: $\%$s

$",$ vp$)$; break; case $8$: free$($vp$)$; break; case $9$: jan$=$malloc$($NAME$\_$LENGTH$)$; break; case $10$: printf$("$Enter janitor's name: $")$; fflush$($stdin$)$; fgets$($jan$,$ NAME$\_$LENGTH$-1,$ stdin$)$; break; case $11$: printf$("$Janitor$\text{'}$s name: $\%$s

$",$ jan$)$; break; case $12$: free$($jan$)$; break; $\}\}$ printf$("$BYE$.$

$")$; return $0$; $\}$