我正在通过工作。A borrow occurs in the subtraction a - b when b is larger than a as unsigned numbers. Computer hardware can detect a borrow in subtraction by looking at whether a carry occurred in the corresponding addition. If there is no carry in the addition, then there is a borrow in the subtrac
我试着通过gcc编译器执行这段代码:int main() unsigned long long int x; printf ("%llu\n", x);}然后我尝试了一下:int main() unsigned long long int x;
x = (unsigned long long)75000 * (unsigned long