Capitalize a letter regardless of spacing - c++

Question

Hi guys I have a question on this code I'm practicing cstrings with. I made a program that capitalizes the first letter of a sentence inputted by the user. I assumed that the user would put a space after placing a period so if the user typed in "im from. seattle" the output would be "Im from. Seattle". But if the user didn't put a space after the period it would be the second letter that would be capitalized and not the first like this "Im from.sEattle" . How do I get it to capitalize the first letter only regardless of spacing?
#include <iostream>
#include <cctype> //strlen, touper
#include <cstring>
using namespace std;
void funct(){
int length = 50;
char input[length];
cout << "Sentence Capitalization Machine Mk.1.\n";
cout << "Type a sentence for me to capitalize." << endl;
cin.getline(input, length);
cout << endl;
input[0] = toupper(input[0]);
int i=0;
while (i < strlen(input)){
i++;
if (input[i] == '.'){
input[ i + 2 ] = toupper(input[ i + 2 ]);
}
};
cout << input << endl;
}
int main(){
funct();
return 0;
}

Answer 1

Try This
#include <iostream>
#include <cctype> //strlen, touper
#include <cstring>
using namespace std;
void funct(){
int length = 50;
char input[length];
cout << "Sentence Capitalization Machine Mk.1.\n";
cout << "Type a sentence for me to capitalize." << endl;
cin.getline(input, length);
cout << endl;
input[0] = toupper(input[0]);
int i=0;
while (i++ < strlen(input)){
if (input[i] == '.' && input[i+1] == ' ' && i+2<strlen(input)){
input[ i + 2 ] = toupper(input[ i + 2 ]);
}else if(input[i] == '.' && i+1<strlen(input)){
input[ i + 1 ] = toupper(input[ i + 1 ]);
}
};
cout << input << endl;
}
int main(){
funct();
return 0;
}