c++ Code Your code must read in input from a file. In other words, you must read

Question

c++ Code

Your code must read in input from a file. In other words, you must read in the ciphertext from the file ciphertext.txt. Do not hard code it as a string literal. This is essential because I will test your code on other ciphertexts.

ciphertext.txt

<X%Z|*aZXcWZa%c[R>Z[%csX%WZ<X%Z+%[PWPcaZcaWZXP|Z|sL[sXPaZ[c>|Zi%RRZi*RRZLaZ<X%Z[Ls.|Z4XPsXZ|%%+%WZ<X%+|%Ry%|Z|%a|POR%ZLiZ<X%ZX%c<Z<XL*|caW|ZLiZ[c||XL77%[|ZXPWW%aZPaZ<X%ZO*|X%|ZsXP[7%WZ4P<XZcZ+LaL<LaL*|ZcaWZW*RRZaL<%Z<X%ZR%cy%|ZLiZ<X%Z+>[<R%ZcaWZLRPy%Z<[%%|Z4cy%WZcaWZ[*|<R%WZPaZ<X%Z4PaWZc<Z%y%[>Z|<%7Z<Xc<Z%W+LaWZ<LL.ZX%ZWP|<*[O%WZ<X%ZRPoc[W|ZRP<<%[PaZ4P<XZ<X%ZX*%|ZLiZ<X%Z%+%[cRWZcic[ZLiiZX%Z|c4Z<X%Z4PRWZLc<|ZOL*aWPaZi[L+Zs[cZ<LZs[cZPaZcZ4L[WZ<X%ZP|RcaWZ4c|ZPaXcOP<%WZ>%<Z%W+LaWZi%R<ZXP+|%RiZcRLa%Z*PW%WZO>Z<X%ZXcaWZLiZLWX%Zi%R<ZcaZPaW%|s[POcOR%Z|%a|c<PLaZ|L+%4Xc<Zc.PaZ<LZW[%cW<Xc<ZW[%cWZLiZ<X%ZWc>RPX<Z4XPsXZ%y%aZPaZ<X%ZW%|%[<Z+c.%|Z*|Zi%c[Z4%Zc[%Z4c<sX%WZcaWZLO|%[y%WZ<XP|Zi%%RPaZ4c|Z|LZ|<[LaZ<Xc<Zc<Z<X%Z+L+%a<Z4X%aZ%W+LaWZ4c|ZcOL*<Z<LZO%PaZXP|ZRcOL[ZX%Z|<L77%WZRcPWZWL4aZXP|Z7Ps.c6%Z|%Po%WZXP|Z*aZ+L*a<%WZ<LZ<X%Z|*++P<ZLiZ<X%ZXPX%|<Z[Ls.ZcaWZi[L+Z<X%as%Zco%WZ[L*aWZPaZ%y%[>ZWP[%s<PLaO*<ZP<Z4c|ZaL<Z*7LaZsL[|PscZ<X%Zy%[>ZXL*|%|ZLiZ4XPsXZX%ZsL*RWZWP|<Pa*P|XZL[ZLaZ|c[WPaPcZL[ZLaZ<X%ZP|RcaWZLiZ%ROcZ4P<XZP<|ZXP|<L[PscRZc||LsPc<PLa|ZL[Z*7LaZ<X%ZcR+L|<ZP+7%[s%7<POR%ZRPa%Z<Xc<Z<LZ<X%Z%67%[P%as%WZ%>%ZLiZcZ|cPRL[ZcRLa%Z[%y%cR%WZ<X%ZsLc|<ZLiZ%aLcZ<X%Z7[L*WZcaWZR%XL[aZ<X%ZsL++%[sPcRZ<Xc<ZX%Zco%WZP<Z4c|Zc<Z<X%ZO[Pca<Pa%Z<Xc<ZXcWZR%i<ZPaZ<X%Z+L[aPaZcaWZ<X%Z<c[<caZ<Xc<ZXcWZ:*|<Z|%<Z|cPRZ<Xc<Z%W+LaWZiP6%WZXP|Z%>%|<X%ZiP[|<Z4c|Z:*|<ZWP|c77%c[PaZPaZ<X%Z|<[cP<|ZLiZOLaPicsPLZ<X%ZL<X%[ZiLRRL4PaZcaZL77L|P<%ZWP[%s<PLaZ4c|ZcOL*<Z<LZ[L*aWZ<X%ZP|RcaWZLiZsL[|Psc<XP|Z|PX<Z[%c||*[%WZXP+ZX%Z<X%aZRLL.%WZc<Z<X%ZLO:%s<|Za%c[ZXP+ZX%Z|c4Z<Xc<ZX%Z4c|ZLaZ<X%ZXPX%|<Z7LPa<ZLiZ<X%ZP|RcaWcZ|<c<*%ZLaZ<XP|Zyc|<Z7%W%|<cRZLiZ[caP<%ZaL<XPaZX*+caZc77%c[PaZPaZ|PX<Z4XPR%Z<X%ZOR*%ZLs%caZO%c<ZccPa|<Z<X%ZOc|%ZLiZ<X%ZP|RcaWZcaWZsLy%[%WZP<Z4P<XZcZi[Pa%ZLiZiLc+Z<X%aZX%ZW%|s%aW%WZ4P<XZsc*<PL*|ZcaWZ|RL4Z|<%7ZiL[ZX%ZW[%cW%WZR%|<ZcaZcssPW%a<Z|P+PRc[Z<LZ<Xc<ZX%ZXcWZ|LZcW[LP<R>Zi%P%WZ|XL*RWZXc77%aZPaZ[%cRP<>Wca<|Zc|Z4%ZXcy%Z|cPWZXcWZ<[cs%WZ<X%Z+c[.|ZcRLaZ<X%Z[Ls.|ZcaWZX%ZXcWZaL<Ps%WZ<Xc<Z<X%>ZR%WZ<LZcZ|+cRRZs[%%.Z4XPsXZ4c|ZXPWW%aZRP.%Z<X%ZOc<XZLiZ|L+%ZcasP%a<Za>+7XZ<XP|Zs[%%.Z4c|Z|*iiPsP%a<R>Z4PW%Zc<ZP<|Z+L*<XZcaWZW%%7ZPaZ<X%Zs%a<[%Z<LZcW+P<ZLiZ<X%Z%a<[cas%ZLiZcZ|+cRRZy%||%RZLiZ<X%ZR*\%[ZsRc||Z4XPsXZ4L*RWZO%Z7%[i%s<R>ZsLas%cR%WZi[L+ZLO|%[yc<PLa<X%aZiLRRL4PaZ<X%ZsR%4Z<Xc<ZPaZ<X%ZXcaW|ZLiZ<X%ZcOOZic[PcZXcWZO%%aZ|LZ|.PRi*RR>Z*|%WZ<LZ*PW%ZXP+Z<X[L*XZ<X%ZWWcRPcaZRcO>[Pa<XZLiZ7[LOcOPRP<P%|ZX%Z<XL*X<Z<Xc<Z<X%Zsc[WPacRZ|7cWcZca6PL*|ZaL<Z<LZO%Z4c<sX%WZXcWZ%a<%[%WZ<X%Zs[%%.ZsLas%cR%WZXP|ZRP<<R%ZOc[C*%ZiLRRL4%WZ<X%ZRPa%Z+c[.%WZO>Z<X%ZaL<sX%|ZPaZ<X%Z[Ls.ZcaWZc<Z<X%Z%aWZLiZP<ZXcWZO*[P%WZXP|Z<[%c|*[%ZP<Z4c|Z<XP|ZPW%cZ<Xc<ZXcWZO[L*X<ZWca<|ZOcs.Z<LZ<X%ZsP[s*Rc[Z[Ls.ZLa%Z<XPaZLaR>Z7%[7R%6%WZ%W+LaWZcaWZW%|<[L>%WZXP|Z<X%L[>ZXL4ZsL*RWZ<XP|Z[Ls.Z4XPsXZ4%PX%WZ|%y%[cRZ<La|ZXcy%ZO%%aZRPi<%WZ<LZ<XP|Z|7L<Z4P<XL*<Z<X%ZcPWZLiZ+ca>Z+%a|*WW%aR>ZcaZPW%cZiRc|X%WZcs[L||ZXP|Z+PaWZPa|<%cWZLiZ[cP|PaZP<Z<XL*X<ZX%Z<X%>ZXcy%ZRL4%[%WZP<ZcaWZX%Z|7[caZi[L+Z<X%Z[Ls.ZPaZL[W%[Z<LZPa|7%s<Z<X%ZOc|%ZLaZ4XPsXZP<ZXcWZiL[+%[R>Z|<LLWX%Z|LLaZ7%[s%Py%WZ<Xc<ZcZ|RL7%ZXcWZO%%aZiL[+%WZcaWZ<X%Z[Ls.ZXcWZ|RPWZcRLaZ<XP|Z*a<PRZP<Z|<L77%WZc<Z<X%Z|7L<ZP<ZaL4ZLss*7P%WZcZRc[%Z|<La%ZXcWZ|%[y%WZc|ZcZ4%W%ZiRPa<|ZcaWZ7%OOR%|ZXcWZO%%aZPa|%[<%WZc[L*aWZP<Z|LZc|Z<LZsLas%cRZ<X%ZL[PiPs%Z<XP|Z|7%sP%|ZLiZ+c|La[>ZXcWZO%%aZsLy%[%WZ4P<XZ%c[<XZcaWZ[c||ZcaWZ4%%W|ZXcWZ[L4aZ<X%[%Z+L||ZXcWZsR*aZ<LZ<X%Z|<La%|Z+>[<R%O*|X%|ZXcWZ<c.%aZ[LL<ZcaWZ<X%ZLRWZ[Ls.Z|%%+%WZiP6%WZ<LZ<X%Z%c[<X

Explanation / Answer

C++:

#include <string>

#include <fstream>

#include <streambuf>

#include <iostream>

using namespace std;

string readcipher(const char *filename){

ifstream file(filename);

string text;

//seek to end of file

file.seekg(0, ios::end);   

//reserve needed chars length for string

text.reserve(file.tellg());

//seek back to beginning of file

file.seekg(0, ios::beg);

//assign text

text.assign((istreambuf_iterator<char>(file)),

istreambuf_iterator<char>());

return text;

}

int main() {

string ciphertext=readcipher("cipher.txt");

//do stuff here with text

cout<<ciphertext;//print read text

}

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