הפוך מקוון מחרוזת

Here is my code. I just can't seem to figure it out. Sometimes i get no output, and sometimes i just get 3 random characters, regardless of how long the entered string is.

#include <stdio.h>#include <math.h>#include <string.h>void reverse(char* array, int numberOfChars);int main(){    char string[250];    int length;    printf("Enter a string: ");    gets(string);    printf("How long is the string:");    scanf("%d", &length);    reverse(string, length);    printf("Reversed string is: %s\n"), string;    return 0;}void reverse(char *userArray, int numberOfChars){    char temp;    int fromEnd = 0, fromStart = 0;    fromEnd = numberOfChars;    while (fromStart < fromEnd)    {        temp = userArray[fromStart];        userArray[fromStart] = userArray[fromEnd];        userArray[fromEnd] = temp;        fromStart++;        fromEnd--;    }}

I really dread asking these questions here but I can't seem to fix it...Any help appreciated

Without using built-in functions, I'm trying to write an algorithm to reverse a string using a list, such as,

foo

to:

oof

Attempt

import restring = "alice"string = re.findall('.',string)length = len(string)for x in range(1,int(length/2)+1):    first = string[x-1]    last = string[length-x]    string[x-1]=last    string[length-x]=firststring = "".join(string)print(string)

What might be a more efficient way to reverse a string, considering time/space complexities (using a list or without using a list would be both OK)?

How exactly can you take a string, split it, reverse it and join it back together again without the brackets, commas, etc. using python?

The question I am answering: Complete the solution so that it reverses the string value passed into it.

I answered this:

function solution(str){ str.split("").reverse().join(""); return(str);}

but it didnt work

Instead, this was the correct solution:

function solution(str){  return str.split("").reverse().join("");}

why is it that the second solution works but not the first?

If the string is "hello world", I need to flip every pair of characters and return "ehll oowlrd". The way I do it returns "olleh dlrow".

var flipPairs = function (string) {  return string.split("").reverse().join("");}

console.log(flipPairs("hello world"));// -> ehll oowlrd