#include <iostream>
#include <cstring>
using namespace std;
void toUpper(char word[], int n) {
for(int i=0; i<n; i++) {
char ch = word[i];
if(ch >= 'A' && ch <= 'Z') { // uppercase
continue;
}
else { // lowercase
word[i] = ch - 'a' + 'A';
}
}
}
int main() {
char word[] = "abcde";
toUpper(word, strlen(word));
cout << word << endl;
return 0;
}
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