#include<cstdio>
#include<iostream>
using namespace std;
int main() {
unsigned int a = 3;
int b=2,c=1;
if(b<c-a) cout<<"int transform to unsigned int"<<endl;
cout<<b<<" "<<c-a<<endl;;
cout<<a*-1<<endl;
long long d = 5;
cout<<a-d<<" "<<sizeof(a-d)<<endl;
return 0;
}
运行结果:
int transform to unsigned int
2 4294967294
4294967293
-2 8
int和unsigned int的混合表达式,计算时会将int转换为unsigned int。普通情况下会将范围小的隐式转换为范围大的,但对于int和unsigned int,就说不准哪个范围大了,经测试是会将int转换为unsigned int