HELP ME SOLVE THIS C PROGRAMMING EXAM (SOLVED)

Question

tell me how to program C to produce an output like this, using the string strlen function:

WORLD
WORL
WOR
WO
W

why my code doesn't work?
https://code.sololearn.com/c1aBk5DAn0TA/?ref=app

Answer 1

Mihail

In your logic there should be -j in second loop.

hafidz ridwan cahya

See working code here

https://code.sololearn.com/cJwF89aGgWSx/?ref=app

Answer 2

hafidz ridwan cahya

In second loop after every iteration of 1st loop, size will reduce because of strlen(str) - j

So when j = 0 then 2nd loop will iterate 5 times and print WORLD

When j = 1 then 2nd loop will iterate 4 times and print WORL

--------------------
--------------------

When j = 4 then 2nd loop will iterate 1 times and print W

Answer 3

by the way, thanks for solve this problem

Answer 4

Can you explain how nested for for loop here and -j logic work here?Mihail

Answer 5

since it doesn't ask to preserve the content, I would have solved it like that

#include <stdio.h>
#include <string.h>

int main() {
char arr[300];
scanf("%s", arr);

for(int l=strlen(arr); l; arr[--l]='\0')
printf("%s\n",arr);

return 0;
}

https://code.sololearn.com/c66gsZCt5aU5/?ref=app

if you want to preserve the string you can do so. two nested for loops with continuous calls to strlen are wasteful

#include <stdio.h>
#include <string.h>

int main() {
char arr[300];

scanf("%s", arr);

char t='\0';
for(int l=strlen(arr); l; arr[--l]='\0'){
printf("%s\n",arr);
arr[l]=t;
t=arr[l-1];
}
arr[0]=t;

printf("%s\n",arr);
return 0;
}

https://code.sololearn.com/ccP90RutFoSW/?ref=app

Answer 6

Hello i need little help

Answer 7

May I know what help you needResQ Hustler ?

Answer 8

if you have a char array it would go something like this:
int i,j;
for(j=0;j<strlen(arr);j++)
{
for(i=0;i<strlen(arr)-i;i++)
{
printf("%c",arr[i]);
}
printf("\n");
}

Answer 9

not work, the world change to wor not worl

Answer 10

can you explain this logic? why like that?

Answer 11

You doesn't even need string.h header file.

https://code.sololearn.com/c1uO8NjQYBrD/?ref=app

Answer 12

Sorry, I made a mistake in the second for loop.
I fixed it now.
int i,j;
for(j=0;j<strlen(arr);j++)
{
for(i=0;i<strlen(arr)-j;i++)
{
printf("%c",arr[i]);
}
printf("\n");
}