passer's blog

//小写转大写 #include <iostream> using namespace std; int main(){ char a = 'c'; char b = a&(0b11011111); cout<<b<<endl; } //大写转小写 #include <iostream> using namespace std;...

#include <iostream> using namespace std; int main(){ int a = 5; int b = 5 | 48; cout<<b<<endl; }