Given a word, print Yes if it is a palindrome, otherwise No. A palindrome is a word which reads the …
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If you need help solving this problem, mention your approach and ask specific questions. Please avoid sharing your code and asking the Community to figure out “what’s wrong”.
#include<stdio.h>
#include<string.h>
int main()
{
char c[100];
scanf("%s",c);
int x=strlen(c);
int i,j;
for(i=0,j=x-1;i<x,j>=0;i++,j--)
{
if(c[i]==c[j])
{
if(i==x-1)
{
printf("yes");
break;
}
else
{
continue;
}
}
else
{
printf("no");
break;
}
}
}
can anyone tell me what is wrong with that?
it says my submission made a boo-boo
#include<bits/stdc++.h>
using namespace std;
int main()
{
string s,r;
cin>>s;
r=s;
reverse(r.begin(),r.end());
if(r==s)
printf("Yes\n");
else
printf("No\n");
return 0;
}
What possibly is wrong with this code?
My IDE shows the answer perfectly, but Toph is showing otherwise…
Suggestions PLz
#include<stdio.h>
#include<string.h>
int main()
{
char a[100], b[100];
gets(a);
strcpy(b,a);
puts(strrev(b));
if (strcmp(a,b)==0){
printf("Yes");
}
else{
printf("No");
}
return 0;
}
There are two things that I can see not being quite right:
gets. In fact, in Toph, you cannot use gets. It will result in a compilation error. To know why you shouldn’t use gets, you can read this StackOverflow answer.puts(strrev(b));. You don’t need to print the reversed string.Some times I use gets and don’t get any error.
You said I shouldn’t use gets. So I used fgets and still get compilation error. Please check my code. Also, Reading your 2nd point seems strrev would work.
#include <stdio.h>
#include <string.h>
#define MAX 100
int main()
{
char a[MAX],b[MAX];
fgets(a,MAX,stdin);
strcpy(b,a);
strrev(a);
//puts(b);
//printf("%d",j);
if(strcmp(a,b)==0){
printf("Yes\n");
}
else{
printf("No\n");
}
return 0;
}
@Galib.603386 Can you share your submission ID where you used fgets and received compilation error?
Sure. The ID is 328328.
I’m getting error because I used strrev. Can you tell me why I shouldn’t use strrev?
The ID is 328328.
It seems the function strrev is no longer available in the latest standard of C (i.e. C11).
I know this can be confusing, but sometimes the standards get rid of certain functions for many reasons.
What I can do is allow an older standard of C to make sure that you can still use the strrev function that many are familiar with.
Right. You should allow the older standard of C. Because If I search google how to to reverse two strings in C, it teaches me to use strrev.
Looks like I responded a bit prematurely.
strrev is not a part of any C standard. It is however implemented by some libraries, which unfortunately, is not available as a part of GCC (what we use to compile C and C++ code).
So in these cases you will have to implement your own function for reversing string in C.
In C++ there are standard ways to do this, so you can look into that.
What’s the problem in my code?
#include <stdio.h>
#include <string.h>
#define MAX 100
int main()
{
char a[MAX],b[MAX];
fgets(a,MAX,stdin);
strcpy(b,a);
int j=strlen(a);
int i=0;
j-=2;
for(;j>=0;j--,i++){
b[i]=a[j];
}
if(strcmp(a,b)==0){
printf("Yes\n");
}
else{
printf("No\n");
}
return 0;
}
It’s failing the first sample. You need to figure out why.
Try debugging your code step by step.
Tell me the submission ID please.
The submission ID is 328380. Why I need 20 characters to reply? This is so annoying.
If the length of your string is j, then why are you subtracting 2 from it?
If the string is “racecar”, then j == 7. If you want the index of the last character, then you should subtract 1 from j.
