Why when I try to reverse a sentence and output into the console, there is a space between the output and the input?

Asked Sep 23 '20 at 13:08

Active Sep 23 '20 at 13:10

Viewed 45 times

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

char nova[500];  

int main() 
{ 
    fgets(nova, 500, stdin);
    for(int i = strlen(nova); i <= strlen(nova); i--)
    {
    putchar(nova[i]);
    } 
    getch();
}

This is a program that allows you to input anything, and then it will print out that thing but instead it will be reversed.

It should be like below.

Input:

Hello World!

Output:

!dlroW olleH

However, the output has a space above it, which makes it like this.


!dlroW olleH

Why does this happen?

edited Sep 23 '20 at 13:10

Robert Harvey

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asked Sep 23 '20 at 13:08

Kuronekonova

5

`fgets` includes the training newline. – Robert Harvey Sep 23 '20 at 13:09
3

C or C++ pick one, don't mix – deW1 Sep 23 '20 at 13:09
`i <= strlen(nova)` that's not right.... and the index `i=strlen(nova)` is actually one past the end of the string. In C arrays are zero-based. Thus the last index is length-1. – JHBonarius Sep 23 '20 at 13:14
Re `for(int i = strlen(nova); i <= strlen(nova); i--)`: What? That would continue the loop into negative `i`. Did your program print additional characters, beyond what you have shown? Is that the actual code? It also prints the null terminating character. – Eric Postpischil Sep 23 '20 at 13:16
@RobertHarvey How do I fix it? – Kuronekonova Sep 23 '20 at 14:07
By [removing the newline](https://stackoverflow.com/questions/2693776/removing-trailing-newline-character-from-fgets-input). – Robert Harvey Sep 23 '20 at 15:16

Why when I try to reverse a sentence and output into the console, there is a space between the output and the input?

0 Answers0