C++ 程序：将二进制文件中的大写字母转换为小写字母

#include #include using namespace std;

int main() { char ch; ifstream fp1("s2.dat", ios_base::binary); if (!fp1.is_open()) { cout << "can not open s2.dat\n"; return 0; } ofstream fp2("d2.dat", ios_base::binary); if (!fp2.is_open()) { cout << "can not open d2.dat\n"; return 0; }

// 读取s2.dat中的字符，将大写字母改为小写字母后写入d2.dat
while (fp1.read(&ch, sizeof(ch)))
{
    if ((ch >= 'A') && (ch <= 'Z'))
    {
        ch = ch + 32;
    }
    fp2.write(&ch, sizeof(ch));
}

fp1.close();
fp2.close();
return 0;

}