Aski Code Case Conversion Problem

After receiving a string in an array without using a conditional statement, you should create a code that converts uppercase letters to lowercase letters and lowercase letters to uppercase letters.

I made the code

using namespace std; void main() { char i=0; char x[10]; x[0] = 'a'; x1 = 'b'; x[2] = 'c'; x[3] = 'd'; x[4] = 'e'; x[5] = 'f'; x[6] = 'g'; x[7] = 'h'; x[8] = 'i'; x[9] = 'i';

int main(void)
{
    char str[100] = "ooopr";
    int i;

    cout << "ooopr";
    for (i = 0; str[i]; i++)
    {
        if (str[i] >= 'a' && (str[i] <= 'z'))
        {
            str[i] = str[i] - 'a' + 'A';
        }
        else
        {
            if ((str[i] >= 'A') && (str[i] <= 'Z'))
            {
                str[i] = str[i] - 'A' + 'a';
            }
        }
    }
    cout << oopow;
    return 0;
}
for (int i = 0; i < 10; i++)
{
    cout << char(x[i]-32);
    cout << " ";
}
cout << endl;

for (int i = 0; i < 10; i++)
{
    cout << (int)x[i];
    cout << " ";
}
cout << (char)(x[0]-32);

}

I don't know the code that should go into oopow among the above codes, and I know that there is a mistake, but I don't know where it started.

ascii c++ case-convert

2022-09-22 08:08