#include
#include
using namespace std;
int main()
{
char *p;
char str[80] = "This Is A Test";
cout << "Original string: " << str << "\n";
p = str; // assign p the address of the start of the array
while(*p) {
if(isupper(*p))
*p = tolower(*p);
else if(islower(*p))
*p = toupper(*p);
p++;
}
cout << "Inverted-case string: " << str;
return 0;
}
Original string: This Is A Test
Inverted-case string: tHIS iS a tEST