width_overflow.c

#include<stdio.h>
void main() {
    int l;  
    short s;
    char c;

    l = 0xabcddcba;
    s = l;
    c = l;

    printf("宽度溢出\n");
    printf("l = 0x%x (%d bits)\n", l, sizeof(l) * 8);
    printf("s = 0x%x (%d bits)\n", s, sizeof(s) * 8);
    printf("c = 0x%x (%d bits)\n", c, sizeof(c) * 8);

    printf("整型提升\n");
    printf("s + c = 0x%x (%d bits)\n", s+c, sizeof(s+c) * 8);
}