#include
#include
#include
using namespace std;
void strToUpper( string& );
int main(){
string text("Test with assignments \n");
strToUpper(text);
cout << text << endl;
strToUpper( text = "lower case");
cout << text << endl;
strToUpper( text += " and lower case!\n");
cout << text << endl;
return 0;
}
void strToUpper( string& str){
int len = str.length();
for( int i=0; i < len; ++i)
str[i] = toupper( str[i]);
}