lostlll的博客

数据溢出 1、程序： #include<stdio.h> #include<limits.h> void main() { unsigned char num = 255; printf("%d", num); printf("\n%d", UCHAR_MAX); printf("\n%d",sizeof(num)); int num1 = 257; num = num1; printf("\nnum=%d", num);//因数据溢出，所以输出结果为1，num占一字节