Unable to understand editorial

#1

i had successfully submitted this question using my approach but when i opened the editorial i understood the concept they used but was unable to understand the code mainly the frequency array part.

here is the editorial code

#include
using namespace std;
int main() {
char str[1000];
int freq[256];
cin>>str;

for(int x=0;str[x]!='\0';x++){
    freq[str[x]]++;
}
int ans=0;
char ch;
for(int x=0;x<256;x++){
    if(freq[x]>0){
        if(freq[x]>ans){
            ans=freq[x];
            ch=char(x);
        }
    }
}
cout<<ch;

}

please explain this to me and also tell how can a character be the index of an array

#2

hi @Parmeet-Kalsi-1631789033630118 each character is associated with an ASCII value which is a numeric value. Computers can read only binary so we need a numerical association with each character to process it. http://www.asciitable.com/ here is a list of all the ascii characters.

#3

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