920413-1.c

来自「this is a gcc file, you can download it 」· C语言 代码 · 共 3 行

union u {double d;long long ll;};
f(double x, int n){union u v;v.d=x;if(n>=0){v.ll<<=63;}else{v.ll+=1<<-n;v.ll>>=-n;}return v.ll;}