How to find the index of element (and a few other things) - c++

Question

I was writing a code that would substitute some random 17 character strings into a single alphabet, and I can't find a way. Basically, what I'm trying to do is this:
char strings[] = {
"L-nIbhm5<z:92~+,x",
"9bC5f0q#qA(RKZ>|r",
"9bC5f0q#qA(RKZ>|r",
"k=5,ln(08IAl(gGAK",
"|N,8]dGu)'^MaYpu[",
"!&,Y*nz8C*,J}{+d]",
"Us9%^%?n5!~e##*+#",
"zF8,1KV#¥]$k?|9R#",
"0B4>=nioEjp>4rhgi",
}
char alphabet[]{
"a","b","c","d","e","f","g","h","i",
}
replace(std::string str){
/**get str and then see the index of the corresponding string in strings[], and replace the string with alphabet[index number], while deleting the original string part that was replaced**/
int main(){
cin >> std::string replace;
replace(replace);
example input: L-nIbhm5<z:92~+,x9bC5f0q#qA(RKZ>|r9bC5f0q#qA(RKZ>|r
expected output: abc
EDIT:
New Code
Changes from the original code
It also has a bigger array than the simplified version(previous code). It displays the structure of the full program.(where the strings are routed to and why)
Basically What it's doing
getting input from user, put it in the input variable, input goes through algorithm() function untouched, and then goes to the replace function and is replaced. It then the replaced string gets returned back through the original route to the main function, where it is displayed.
I've kept the arrays a string type because the const char* gave me a segmentation error.
std::string Subs[53]=
{
"LQlMv]G5^^1kcm?fk",
"7W^S;/vB(6%I|w[fl",
"<w7>4f//Z55ZxK'z.",
"_W5g(lu<pTu3^_A7n",
"OfLm%8:EF}0V1?BSS",
"|+E6t,AZ~XewXP17T",
"L-nIbhm5<z:92~+,x",
"L-nIbhm5<z:92~+,x",
"9bC5f0q#qA(RKZ>|r",
"9bC5f0q#qA(RKZ>|r",
"k=5,ln(08IAl(gGAK",
"|N,8]dGu)'^MaYpu[",
"!&,Y*nz8C*,J}{+d]",
"Us9%^%?n5!~e##*+#",
"zF8,1KV#¥]$k?|9R#",
"0B4>=nioEjp>4rhgi",
"EG#0[W9.N4i~E<f3x",
"(0Pwkk&IPchJHs.7A",
"7XgmQ6fW<|J+NY[m0",
".g4CwX/DU!!~!zbtZ",
"+_U'qn_/9Fo|gT/!n",
"=0s(mYh&F%y=MBS5(",
"cg71(}bo+Q5P8F[T6",
"lc|a\%5.9pOpooU+QR",
"E_(3A:o+.]qL3MYA6",
"H#O'X_RiVS#8l0bKD",
"Y1gbGD`~8d>HSWN35",
"LQlMv]G5^^1kcm?fk",
"T4}gI;`BFVfhw=-sf",
"6BHMA0IRix]/=(jht",
"yS$=#Jdpp?P2k6SMQ",
"t1~|kkh+>4d>}OQ`a",
"2Y-\\CU\"944yBluWD5",
"'M\\ZbIX5{`Xd;qi!o",
"?N+RtVqj_r(C5##0\"",
"2;*Livh?V$X/8z#Md",
")IN|7FOs2l-mAM[d#",
"(~f268J},xXrK'Rp'",
"&r/qf9fFHnzV!RzH/",
"}naDRH4p$NI2a).t,",
"{8DM+7!.Mge|~fnO|",
")r[#nI0YDH>6cE38p",
"(0Pwkk&IPchJHs.7A",
")r[#nI0YDH>6cE38p",
"8M-=cQFQ,pPo7eu=p",
"0PHw=/|(tZ1}FHm/'",
"[su`'0Oybc.\"-/W5)",
"1uHl[IC7Sr#NUJV;I",
"8z8%,jK0CDOkJz8I?",
"3Ao2yXDN%YzpE&Suy",
"zNs`7E'e/$i8VqaUL",
"bzHmA^K2>7`UZ?!AO",
};
std::string Alphabet[53] =
{
" ","a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","r","w","x","y","z",
"A","B","C","D","E","F","G","H","I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z",
};
std::string replace(std::string rep) {
int len = sizeof(Subs)/sizeof(Subs[0]);
std::stringstream ss1;
for(int i = 0; i < len; i++) {
if (rep.find(Subs[i]) != std::string::npos) {
ss1 << Subs[i];
}
}
std::string input = ss1.str();
return input;
}
std::string algorithm(std::string input)
{
//some other algorithms come here(not relative to this question)
input = replace(input);
return input;
}
int main(void){
int ed;
std::cin >> ed;
if(ed == 1){
//different function(not relative to the question)
}
else if(ed == 0){
std::string input;
std::cin >> input;
input = algorithm(input);
std::cout << input << std::endl;
}
else{
std::cout << "1 or 0" << std::endl;
main();
}
return 0;
}
example input: L-nIbhm5<z:92~+,x9bC5f0q#qA(RKZ>|r9bC5f0q#qA(RKZ>|r
expected output: abc
actual output: L-nIbhm5<z:92~+,xL-nIbhm5<z:92~+,x9bC5f0q#qA(RKZ>|r9bC5f0q#qA(RKZ>|r
Sorry it's become long.

Answer 1

There are few mistakes in above code :
char array initialization is not correct.
method body for main and replace method is not closed.
Currently by default return type of replace method is int.
There is string#find method which can be helpful here.
I have tried to make those fixes and here is updated code in C++17 :
#include <iostream>
#include <sstream>
using namespace std;
const char *strings[9] = {
"L-nIbhm5<z:92~+,x",
"9bC5f0q#qA(RKZ>|r",
"9bC5f0q#qA(RKZ>|r",
"k=5,ln(08IAl(gGAK",
"|N,8]dGu)'^MaYpu[",
"!&,Y*nz8C*,J}{+d]",
"Us9%^%?n5!~e##*+#",
"zF8,1KV#¥]$k?|9R#",
"0B4>=nioEjp>4rhgi"
};
const char *alphabet[9] = {
"a","b","c","d","e","f","g","h","i"
};
void replace(std::string rep) {
int len = sizeof(strings)/sizeof(strings[0]);
std::stringstream ss1;
for(int i = 0; i < len; i++) {
if (rep.find(strings[i]) != std::string::npos) {
ss1 << alphabet[i];
}
}
std::cout << ss1.str();
}
int main(){
std::string rep;
cin >> rep;
replace(rep);
}
For reference : https://onlinegdb.com/Bd9DXSPAa
Note - Above code is just for reference, please make sure to add all test cases handling.

Answer 2

I made a c++17 version for your code.
Replacing 'c' style arrays and pointers with C++ style containers, iterators.
And using std::string::replace function. Use the standardlibrary if you can,
its tested and well documented.
#include <algorithm>
#include <iostream>
#include <regex>
#include <string>
#include <vector>
// std::vector/std::array instead of 'c' style arrays.
// allows us to us range based for loops later.
std::vector<std::string> strings =
{
"L-nIbhm5<z:92~+,x",
"9bC5f0q#qA(RKZ>|r",
"k=5,ln(08IAl(gGAK",
"|N,8]dGu)'^MaYpu[",
"!&,Y*nz8C*,J}{+d]",
"Us9%^%?n5!~e##*+#",
//"zF8,1KV#¥]$k?|9R#", // <<== I commented out this line, ¥ is not a valid charcter in my environment
"0B4>=nioEjp>4rhgi"
};
// a string is already an array of characters.
std::string alphabet{ "abcdefghijkl" };
std::string replace_with_alphabet(const std::string& input)
{
std::string retval{ input };
std::size_t index{ 0 };
// range based for, it will keep the order of the vector.
for (const auto& str : strings)
{
// look if you can find any of the predefined strings
// in the input strings.
const size_t pos = retval.find(str, 0);
// if found
if (pos != std::string::npos)
{
// get the next character from the alphabet
std::string replacement{ alphabet[index++] };
// use std::string::replace for replacing the substring
const size_t len = str.length();
retval.replace(pos, len, replacement, 0);
}
}
return retval;
};
/**get str and then see the index of the corresponding string in strings[], and replace the string with alphabet[index number], while deleting the original string part that was replaced**/
int main()
{
auto output = replace_with_alphabet("L-nIbhm5<z:92~+,x9bC5f0q#qA(RKZ>|rk=5,ln(08IAl(gGAK");
std::cout << output << std::endl;
}