To toupper in C++

[fstigre]

Hi,

How can I make the output to always be uppercase? I tried a few thing but I cannot make work.

#include <iostream>
#include <string>
#include <cstring>
#include <algorithm>

using namespace std;

int main()
{
    const int SENTENCE = 20;
    char sentence[SENTENCE];

    cout << endl << "Enter a sentence: " << endl;
    cin.getline(sentence, SENTENCE);
    cout << "You entered: ";
    
    for(int i = 0; i < SENTENCE; i++)
    {
        cout << sentence[i];
    }

   //system("pause"); // pause system
   return 0;
}

Thanks a lot for your help

[Bazzy]

toupper from <cctype> (works with single characters)

http://www.cplusplus.com/reference/clibrary/cctype/toupper/

[fstigre]

It works with a single char, but cannot make it work with the array. I cannot figure this out.

[Moschops]

cout << toupper(sentence[i]);

[fstigre]

I already tried this but it doesn't work.

[Bazzy]

because it returns an integer that you'll have to cast back to char.

If you want to apply toupper to the whole array you can call std::transform
http://www.cplusplus.com/reference/algorithm/transform/

[TightCoder]

int main (void) {

    const int SENTENCE = 20;
    char sentence[SENTENCE];

    cout << endl << "Enter a sentence: " << endl;
    cin.getline (sentence, 20);
    cout << "You entered: ";

    int I = 0;

    while ( I < SENTENCE && sentence [I]) {
        if ( sentence [I] != ' ')
            sentence [I] &= 0x5f;

            I++;
        }

    cout << sentence << endl;

    return 0;
    }

[fstigre]

Thank you all for your help!