From 86aa1d02e64e7b71846cf15ce4716dea1dfecf67 Mon Sep 17 00:00:00 2001
From: shuklank <shuklank2709@gmail.com>
Date: Sun, 3 Apr 2016 22:59:10 +0530
Subject: [PATCH 1/6] Solved calculator.py

---
 calculator.py | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/calculator.py b/calculator.py
index fcdf5f0..bef6d97 100644
--- a/calculator.py
+++ b/calculator.py
@@ -1,20 +1,20 @@
 #!/usr/bin/python3
 # four function calculator in python
 
-def add(a, b)
+def add(a, b):
     return a+b
 
 def subtract (a,b):
     return a-b
 
-def multiply (a,b)
+def multiply (a,b):
     return a*b;
 
 def divide (a,b):
-	try;
+	try:
 		return a/b
-	except ZeroDivisionError
-		print "Division not possible ", end=' ');
+	except ZeroDivisionError:
+		print "Division not possible ",
 		return False
 
 def calculate(a, b, op):
@@ -35,4 +35,4 @@ def calculate(a, b, op):
 a = int(txt[0])
 b = int(txt[2]);
 op = str(txt[1])
-calculate(a, b, op)
+calculate(a, b, op)'''

From f4de73b368961d461cf1096caaa9cb1f1e9a392f Mon Sep 17 00:00:00 2001
From: shuklank <shuklank2709@gmail.com>
Date: Sun, 3 Apr 2016 23:03:43 +0530
Subject: [PATCH 2/6] Solved several bugs in heap_sort.cpp

---
 heap_sort.cpp | 18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

diff --git a/heap_sort.cpp b/heap_sort.cpp
index a444237..75273e2 100644
--- a/heap_sort.cpp
+++ b/heap_sort.cpp
@@ -1,13 +1,13 @@
 // !/usr/bin/g++
 
 // C++ program for implementation of Heap Sort
-#include <iostream.h>
-using namespce std
+#include <iostream>
+using namespace std;
  
-void heapify(int arr], int n, int i)
-//{
-    int largust = i;  
-    int l = 2*i + 1
+void heapify(int arr[], int n, int i)
+{
+    int largest = i;  
+    int l = 2*i + 1;
     int r = 2*i + 2;  
  
     // If left child is larger than root
@@ -16,12 +16,12 @@ void heapify(int arr], int n, int i)
  
     // If right child is larger than largest so far
     if (r < n && arr[r] >= arr[largest]);
-        largwst = r;
+        largest = r;
  
     // If largest is not root
-    if (largest ! i)
+    if (largest != i)
     {
-        swap(arr[i], arr[largest);
+        swap(arr[i], arr[largest]);
         heapify(arr, n, largest);
     }
 }

From e2b6dd00588fcaee2a466acfb27a5bdd3523a2be Mon Sep 17 00:00:00 2001
From: shuklank <shuklank2709@gmail.com>
Date: Sun, 3 Apr 2016 23:05:21 +0530
Subject: [PATCH 3/6] all bugs solved in heap_sort.cpp

---
 a.out         | Bin 0 -> 13599 bytes
 heap_sort.cpp |   6 +++---
 2 files changed, 3 insertions(+), 3 deletions(-)
 create mode 100755 a.out

diff --git a/a.out b/a.out
new file mode 100755
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diff --git a/heap_sort.cpp b/heap_sort.cpp
index 75273e2..d6f80c4 100644
--- a/heap_sort.cpp
+++ b/heap_sort.cpp
@@ -26,14 +26,14 @@ void heapify(int arr[], int n, int i)
     }
 }
  
-void heapSort(int arr[], intn)
+void heapSort(int arr[], int n)
 {
     // Build heap (rearrange array)
     for (int i = n / 2 - 1; i >= 0; i--)
-        hepify(arr, n, i);
+        heapify(arr, n, i);
  
     // One by one extract an element from heap
-    for (int i=n-1 i>=0; i--);
+    for (int i=n-1; i>=0; i--)
     {
         // Move current root to end
         swap(arr[0], arr[i]);

From 0f2402f1a10bfdc2d3836e5f1616353668686abf Mon Sep 17 00:00:00 2001
From: shuklank <shuklank2709@gmail.com>
Date: Sun, 3 Apr 2016 23:07:16 +0530
Subject: [PATCH 4/6] solved bugs in merge-sort.c

---
 a.out        | Bin 13599 -> 8733 bytes
 merge-sort.c |   5 ++---
 2 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/a.out b/a.out
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diff --git a/merge-sort.c b/merge-sort.c
index 672cb36..35b5b4f 100644
--- a/merge-sort.c
+++ b/merge-sort.c
@@ -1,7 +1,6 @@
 // !/usr/bin/gcc
 
 #include <stdio.h>
-using namespace std;
 
 void merge(int arr[], int l, int m, int r)
 {
@@ -22,7 +21,7 @@ void merge(int arr[], int l, int m, int r)
 	k = l; 
 	while (i < n1 && j < n2) {
 		if (L[i] <= R[j]) 
-			arr[k++] = L[i+];
+			arr[k++] = L[i++];
 		else 
 			arr[k++] = R[j++];
 	}
@@ -59,7 +58,7 @@ int main()
 	mergeSort(arr, 0, n);
 
 	for (i = 0; i < n; i++)
-		printf("%d ", &arr[i]);
+		printf("%d ", arr[i]);
 	
 	printf("\n");
 

From 1cef4033fcae1cbd1f1104625a0c94ba50ce04d9 Mon Sep 17 00:00:00 2001
From: shuklank <shuklank2709@gmail.com>
Date: Sun, 3 Apr 2016 23:12:39 +0530
Subject: [PATCH 5/6] soved bug in permute.c

---
 a.out     | Bin 8733 -> 8784 bytes
 permute.c |   4 ++--
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/a.out b/a.out
index 91de295fb5d276edfd9724cb47a69f33c87fba7c..ed58922d8d367ebf597d83bd959a1af384ccd1ac 100755
GIT binary patch
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z8SC&kX@FIGobC|#VA6}5(vChQC)5Z#)K>Cy5hA?E@f?z51D>($NXwyTqFpVl(HmjE
zcps{ZM7uggasK}p)q{junj5+rNT{{#V4M1{XQAWbzefMD<;+)7&t59&&FSoJh>#FO
H=pz3B7Q0VA

delta 3232
zcma)84Qx}_6~5O$iT~=K{LDW|Y9}ijL6DFP$f5{g7v6duffPzS*hWZL2qW6YD04=%
z2ApDOd3tyxx?6>`Y;z?vya{bZ?8hB+v6GBIHB}C+Xw^|ILuqB2b)qV3VTF0;Tt5>h
z)uvtRy?f7h&-u<d_nv$GGMj#~X~g9qdOyLIe-n}ztv_oDTLebJmeIEwjDAgCV%$NW
zE4yLJOE*k;lN%=fOZrwt%O|}LUVe5<>)Q=KZ7==G-Q}ir-wX27nhsjWXEaV)FWzmu
zNxRwHyKnbFa^PV9{_tM@ymrm{=7zOEsS!Uyw1S?3L}6qX5+Tn1{zq`GUBw1G{YJFu
z<h8nTs^e>Q(FlwF-M|$6fZ0db@l;r!-3H1mI%SwtNz^X4_UoXMTeb(@Hm@H>DDT7B
zTeCT6%f5;-y1$hX@{=gzD%?s5xgBK;^wx_)ejMe94uLoTP45TgnO#i2$)a<&J352Y
zsT3?0n@)F#Zo1m&C)u;0cxSK8yNQtGc6$#Au~i+=vFKeZlixX{>6%OepUC7+*Emk)
zW^LYK#F8i#^wW2>pwHw9eqCSFEc9-wdc*5~Ve%0&;0S?6_6Ruax~zX5Ao}4XCeEVk
zcNqAxl9iFb_Q00|p+M(0Si^lxK72wRI3|aN<=7AyF?p8BmzCo<Rzkz|6LKb+qOz1w
zq+#Vph$19Q=M*WydNVBg9%XXqMHmL<>w$5MSd3o}ye!72S$bB(VjbEf?k<aFX@t?t
zMHK!Z6h8iteKTce^;76Mn$og#RwHa=DXB>37JQ@x@3p{1VTS%PftSSi(>}n(c#(^b
zi(Nz(`M5GIjUmbWN<|t|LdR%^oo2C$<APX`P5_evg$A*N##rw)*)kH9#wh5vNr|C9
zPfKxBoNt8HiFE)R|8MqJlu$fxABln%Xtqh`hOVjvAj;rgIwnhJ=8r76Q!FDOsJ4o3
zq%|FBQlvBBN)DY_5@^h#fw08X7*j$?c3ROLl_|!y$RL6d1M3MUEaJi<4i;Bbi+pm2
zE%_L2C-=jq&#zd*QcO}5uWm$E7w5>U=()gNw5HAf%QLRZk*iF;!(x4Jel4&w&=uGf
z=;q%q@k9>yDAJq~nicgok$%rhGc$MP2>>b7<9#J`U)eGTp=9M(nLM5SEf%me8|#4g
z{TQPQGe5?eEwgAaAPi9bwfni;)k!=%#m8g0I1ZC6CM6?qEXH4lGc8VP_UtD}pIlm=
z|KAaSqI#*QJU=Kd&!yFQ30Hdl^DH9j;1bjjOW)K0!{T^c5KmOP1dE?+l`aj<U;%)|
zAH_aFeu;nQa??_ttPW?C5OP6HL0WG-OzVYzEuy(TZUTbr(|~&NH<Wy1(av<?-NH|m
zR@Nl6KDef0tFYg;x&ED|zp(TJEnd^vf8OKi($3%>vTTo!5L%^e^8;%sJX7~_xs%X8
z1`c*Y?|>|RgZP77ZVq}sM6H9nISgC22KqVZhbZ4=sMDnG@uP-@$ZBBd0Zn4Hf63}<
zx0w$ahRFs`+lntdR)_FPc;MD0A@FbkZ}ouH{;X!>BPCl-X@8)L=}(qKOSLa(ETsmR
zgH{bs7@jww9)=Jo=xYuM9pw8VJZm7r)s(DQP$(vRls+Ux=Tq=}k+&K*>Mf8&&xL1<
zzow>?`ez*1bC30NWrI3DXb}Sce4<U6_><OMl=1UcFYVzo)(v!!J8a%cqAKG0Vasa$
zgz&drPQKGtL6iI`o0lf|sO`Dh->I6H)&9ELzpM5iafhdz&r;om9rmP#j&MhLqk|zG
zG?xEwCOv#Bpa~UCsHlaH0-99Oq>8TQGv$pY5fCtBwcJ#(&QXY$=makr<XbBmjfHdv
zxm?lWh^rCBRUOE;qOq*-xkB`L%LzR%t86e$LA7Fo6>6_s=g6pH21^y1nU7XBnu@+y
zUI8Va*)Jx2X3>$(3y#l3DE0GEXQR;%|FGEn{Hn9Xi2thCI=Iobfp+j9ynn`J*9PNq
zx0rwoW?U`CxHm5y<_`DoVW0lyuGE&21oTeW1(b{=D|!eFR=QGa2FrlQN#jC-jpk2z
zob82l@@)CHme@!kuf@2X6f#?kJBZKBuX%nBDebPR)Vd-3(W-8`ntxE`Z0b=<tzZ&>
zfd(oqz69S6I3;M?THVME)pkBu&D?(ysDm7^_+hlrUgI-WPJX-E<^HPx%ZSU`voH;#
z+q|~M>At7V+Lz2)_*R&$qlA<}Ecn%g4bLdHW`4fLNuS`))Hs8^pyMMhQrM`x1|j<a
zw*y|-vI0IJIIU12{sJWWrv>LJe7k?8+Aih1h#n)az^p^#B1|oY0?iwU7j2GOujF0f
z5mwZY_b9FoFuJYc@2e{<t{}iaQgQr9#MUR?gp@$~cH-uxUPsUjV_cbs$3WF7%j<k9
z>qk|6{Nlt0*OO?U<xO6vz6EFb3@vwWg%Reqbk(|0&v;0%V5y$>PMf~nckmm1tG@f4
zgJB-=9jG`k5XKLBzyFEN!N)gtH#flNJpYGpxv#r#&+hPU(!IBTf4};<zgX#8wL5Hr
TY#VS9G2)Z8M@zcFAWZ%P!`6~S

diff --git a/permute.c b/permute.c
index fc8d77b..e5236c5 100644
--- a/permute.c
+++ b/permute.c
@@ -21,7 +21,7 @@ void permute(char *a, int l, int r)
    {
        for (i = l; i <= r; i++)
        {
-          swap(&(a+l), &(a+i));
+          swap((a+l), (a+i));
           permute(a, l+1, r);
           swap((a+l), (a+i)); 
        }
@@ -31,7 +31,7 @@ void permute(char *a, int l, int r)
 int main()
 {
     char str[100];
-    scanf("%s", &str);
+    scanf("%s", str);
     int n = strlen(str);
     permute(str, 0, n);
     return 0;

From 236caeb9f6adcfa2507b44b467a94669ccd75789 Mon Sep 17 00:00:00 2001
From: shuklank <shuklank2709@gmail.com>
Date: Sun, 3 Apr 2016 23:22:07 +0530
Subject: [PATCH 6/6] All bugs solved in stack

---
 a.out               | Bin 8784 -> 8899 bytes
 stack_using_array.c |  16 ++++++++--------
 2 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/a.out b/a.out
index ed58922d8d367ebf597d83bd959a1af384ccd1ac..867e124b9595e8522fb75ac2946134a807fd3316 100755
GIT binary patch
delta 3011
zcmZ`*Z){W76~FJ<PHbnf-wO`5Lm<zEhz5a!({>apih)Et7(=EB8d3+g=QzY^nuNrr
z;RAD+6VQ{D&hG6BoA}UeY^&B*D?+GLo8&+uGS&~ntX(VmVJxE4OUtULjWnx-dFR~s
zUPzF3E#Gs_@BF#v-23jITdk9AIggmL1PL~+C**3r>38<2Du$7%s{9?lEyQcmVJdQG
zeG4{CTCiy@2JO&b(m_AqK6GtMf3_tbIez2H^Va+ut2h1nSDVEH^gRD8w~iKh_iH8(
zw-FicDb}~qfXPkoy3F(=-bH28+V%0_M3RKViJ|`3)~(^8ShTN;45X4n*u}b|gJfVZ
z(U<I^Z<wCm-Qs@+#^&`OAtvCo#sS9xE9kO2k*G#J=89OVE&<i><S6x--%AS-W>yJ3
z{*5MQ?px)o#Zn~^d2AwSQDdNyGgH<{!$PCwXTG*eq}(_Uy|W<*9Ln9OoV{Cy*7ya=
zn9uAjCeNUZxz0|2oGv%sLBNE-d(7ZA%4U?`Wb$87wxFD2@^zFeP#ys}@bA4!@u;lK
z$eDX{p^m-N6CqoW$kW&ET9Hh5RR)QA4h-kJoDHq8)W@LWL-M8w5IIxY;E<KiU*V5T
zUWI_H)cGR?)Rpf#8%7YjiV`}|o0bg$rkc@JBioxG7m^YWK@j!FFvyV`mX!c;-%R3U
z$eHbbrt2#F>CAmWR!)_a)V!Q+D`iQh)R}S>Iw4W@r~fUN3phRM$G~ao@eqfMA~2El
za_n~Y`}4~FocZP?jt1+)LTV0U6A&(m;ew0d&O8d24za+Bp!sIo1o?cnb<B0d2qi&w
zDuhzAL}^?2axG&IE#RQ7IkR%3Fb1*N45@Pu%jL|=3tZ;Z0y+6f!H${#2{1ja)AvKL
zl+$Ao7#&+d0nfDhHdqucV1mCy?jmyMkb4`sapbNbmjO;5A3Kb>!?2TpX~X^=6j_F6
zN_;W~UD}>0aY@hY`;bAVWJ*RdC9`w%=OE2qgsyO7(f9fE|BHGEqyCJIHqKI3{w^!i
z>i1yyFJq7gR)N4c0x#f4rePnnzzDMP3FP>V{2N)Bla+6?R>dx7uAAk|gjqcY4v_!f
zv>bj!i2BC`2q7$qISMAZ!WWBK{sIg@{X;h7($X)1BFk_n*g5(x7_d3HIoaiRHjF|h
zgyd+h(zV)Sk>E=m--NV%f79oI&*W<lO}LfSj~~!$mF?;FWHk1Y)PEvA*wx$rijQb=
zs;|=k8apM@)|ZSAN+<hMgHo)!KM{*dB;c0@QbXOO1!(^OdCD&xizk!7Jq-XJN<$c!
zG<NFFC!)P6aD!-xAt~7%m%vtv_r4T=Io_AFla9fYQuJ6f(f4Gad2^Gr19r?R({mvx
z1kYL5gL3%-(AR<X0zC~AFa`7@p!a|}Vb#pAW!3;)2eb!hE6{r|Go3&?;JbT=qerbz
z@X`bN6RY1c@NKy~La$iYrmsNEc8EcCI)pR)?&=Euz;`OGgwzAn34ayz&n?xTU}~lx
z1>6KVIG5`8J<?wU{A=*vzf{lfS&TnL$Xc=n0`x<YiwT%|IJ9U5=pOusAJT2MUAB#2
z@+Q>9U(VZJ<ZYpfAm|9$OudfvHL6*Y;8<s^!$x0l9OZ`TB}W6-LyL|b+*?$1hPe_w
z?rh*@Xx@32J}F3ImwxY^(CL}WJB7dU+yoU@G>gL~E$T3y#n5`_K|p78bVf%7ng_I`
zqa_{POp7bhFz7*7v(3m(rHX5dDCk28c!EP4p+#47jd20zbo9E3*3|m#9k3g)K|%X!
zzbi&`F{0nT7ihk=Sv2lm<4*3NML<J#%{7E4613!Hab=q0LNxDgwuRsb#}=YD-CJyU
zhGUCRn`Z|Xp?jhK164dbY|na`f_zGgo-H;((xl5&^u7<X`%iDJsgle9b;HbpL>+Z4
zoJx1rxjBIzud6jx!$v$_=iX=3q4{gQi8zT-&~jWLMoG(Yk%a8@cHM8Gi0G<XlNS=s
zuL@IZz3^JS)jOw8tl_g07@kzaC*rGjLseVro53+r{{uR((p<|CkxWzt4P!>{(BdjL
zovZhF|Hb4Q;&DWlS^S6kR=d6IH9=~K@R)W5JqX$+j)1P3;I)g*c!q4HmsY#E1N1c5
z^ni^-Jj7TBW(ZvhZ31UOD}dHm7eo6hi|l}}A!tC1zK&krx0tq?+|suO+qIy7hsFF*
zkNNnBpXy#!@GQW__A=0aV4mr(Kr8Yda#;UDm<e<b5MQ!>W?f;2VzKr*JsR8jpsUq!
ze1l+%v!0Mfzy;zZ-H*lJpxM_DV_)d@BtVO6+=1<SIDE@sW9J9ZT{?bBpMrL#C1ei`
zG`KA<qLvo96_%92dCvle1wKC26g_P3vUpWQrI#9}MRufzQ$vZqW8vuFVDuzSO9L+b
zDH;s!*}r$!?r@7A9-{OsY1_JRyfd1Nl5kg|FQGqFml+YbIB2hLQ-yYO(DS~H_D5F-
do%H$5c*W2;U$cl0;bqQr%@gY@!Vo!0{s;V;W6b~n

delta 2426
zcmai0eQZ-z6u<Aa-P(P$eOpUEwx!*03gTLZ!$|;nz$$MD3c}os+4{ylvayMStpO8Y
z;6PRjNtZ*SsEHp@F(w*t3C?I_V}wC8ri+Pg=pU7Uc@v0JQ5Q3)=e)k^HvaH5@1A#l
z=XcLN_uP-y;Xte+>J(&y$ViecW2gESp3FFIQZaVi)OXoulK7;x2?Xv)q0^YOoW^9A
zl&(m^tO7pezO?<-`|;3EFFdb^(EaENuHm(B!j<2_EBwQp8%B8tw-{SLSFXNSLaELH
zvTpvOV6e6GxrSxSf}IWZJDOQXsH>9&gPmRV4Q;`OmbPGXeQP`G?Aq1dv;#iSl~tFq
zbsH+ztPL*lE%7bI;d%V&@L^1k4~Op@YAZe@j@H&}^3>ovVK&v)v2B_ia<}5NdDaev
z`cvIKH;humP>|_m(&51_gYpcrq@MG}Vbmyzr8($I6x*=1ctm_7yM<g6@dQe72H7<J
zL`=1LvMINTLDl{{18p7Ir&RklvMKM0H_`4+6#q<sfq*Cir8g_XqjggFiqvy;a?{qz
zkwIn@nKUvKO(!*yhe|n##9Pf453a>P&?>VksiX##)H7w4!q;~5wZj7#Po2@N+Oy<J
z#4Vl!gbk3D;tx$h!f;QiO1PpC4y@da39*n+g`t%FI8yBe!y^cBzYkLdq@I;iur<xs
z9p0x%;ZR(P1Qg2|)*DFRTikNSN<c5QXjCP7t+m4xN$R=bm9R@VbTwQRj|8qR55z-e
z;!5EWrS485aXo}+I52&^DH52L8e*!CJBOgua4~6Il)~Q<eJ@oG9mgatQl(}P{+jUP
zi2rYA5lKCPX%2~)!+yA=<#+x-qZH8>FTf&6;lNbspmZz{mBJU!+He8XdMZXtGl`BU
z;^(&$iE!X(r0OU^Ur=!=2LZz;s~_1o)hIofrAEY^^*Zt|4LAENo<qcC5I5QiTGG6@
z8pldVZ`rW$TIu)F&}|(S%cx}E2EnvteQ_sl@jTsfTx*t&&)9S#5k)OwI2rX)%!$Tp
zL_LODhvQG7-h<kS`%*zI)Ba@ect#N)pN3r-K7)u+I^f-m`P)Jm$4~CnX6uXm+U&IL
zS?P52^YLlK=MeheK>e?ue^n)rpC+QiaocA3n^iyM`wl)ecVK(w8q*DYJ%Cice<<?_
zzCV_^f;V~7L_|@*Wxg*brWaKM53eeEBRpxY<77B(_HcV()Vzv|f?x@93hcCaxH0In
z9LY@6uC;jv5pu1?(BjU5IH&KItphywKDcuIf~*tOcrqPAls#}dFBjT#^Mx_ZGp2dW
za02;?hAJ8=!gy{s4*j&vZ%XADgFaiiFsWrcsZU1kfN`5YCw0@xbf!_>=D}_EW$1Ai
zk<hg44+&Pyv})IEI-Ickh14aRx_m2O98p>0${M$<-!-qB<0LrY@S7w&&m<CzI?7FS
zlu2qpaIWHNU^BKSq0hO>wAiIOSQN&c<)%ST%5u3r!5WXc99Yp&mtALM3UKaqTntLx
zc3l>mRCP9!q26uZV8;B#WY-z3j#*f0LNj2zn5`@|rP;W^WFuU5zlW1JnCHMm59Zn7
zqrCM(R9ny#-3PzsIl!B5bg|TK(OlK2Ip)HtuFm&!Uf7vm?K-Do0*jhNjg?d}_z^ij
zfKcG5zo~NUY=K#x#radUa+q}vZo<REF$aE3X7fFW=P=x@T0!W}C-K8u1rFC^==Cxu
zOD#{*$JkRaTHvUp4+iz!tIbJ0U`Xje981Ph%b4o5Tjk$f{CyOS>r>kgsdas&MVLG8
zIAztXpjY6XY}1^%{6YAPMbtJl)8nKlPx|<fG^s6qQxUgf?d3UfTpB-h1~fYJCi(Z@
zHL(Y@4)j?gQEw8|rEt*W-~w>k<8TF$LrKpqN*i$s4{H%NYNb@~GK}z&if6JIaNd#h
zj;3ADhPs+y+}i<lh07{5n+2O1>$~b%u(@?dtM->e6leb1nESuvKW`a)R#*bR6fT0|
Yq7tYs^1;hR_hxqPuJ2$$jMl~e0Vp_Lg#Z8m

diff --git a/stack_using_array.c b/stack_using_array.c
index e38b880..663c7ec 100644
--- a/stack_using_array.c
+++ b/stack_using_array.c
@@ -1,6 +1,6 @@
 #include <stdio.h>
 #include <stdlib.h>
-define LIMIT 100
+#define LIMIT 100
 
 struct stack {
 	int top;
@@ -24,11 +24,11 @@ void pop(struct stack *s) {
 }
 
 int gettop(struct stack s) {
-	return (s->item)[s->top];
+	return (s.item)[s.top];
 }
 
 void printstack(struct stack *s) {
-	int i = (s.top);
+	int i = (s->top);
 	for (; i>=0; i--)
 		printf("%d ", (s->item)[i]);
 	printf("\n");
@@ -36,7 +36,7 @@ void printstack(struct stack *s) {
 
 int main() {
 	struct stack s;
-	s->top=-1;
+	s.top=-1;
 	int n, c;
 	do {
 		printf("Enter your choice \n");
@@ -44,18 +44,18 @@ int main() {
 		printf("2. pop\n");
 		printf("3. gettop\n");
 		printf("4. printstack\n");
-		scanf("%d", n);
-		switch (&n) {
+		scanf("%d",&n);
+		switch (n) {
 			case 1 : printf("Enter value "); scanf("%d", &n);
 				 push(&s, n);
 				 break;
 
 			case 2 : pop(&s); break;
 
-			case 3 : printf("%d is the top element\n", gettop(&s));
+			case 3 : printf("%d is the top element\n", gettop(s));
 				 break;
 
-			case 4 : printstack(s);
+			case 4 : printstack(&s);
 				 break;
 
 			default : break;