void main() {     int a =5,b=3;     int *p;     p = &a;     b=*P+5;     printf("%d\n", b);     *p = 4;     printf("%d,%d\n",a,*p); }

输出结果：10     4     4

之前在学校的时候就没怎么搞懂， 现在再重新学习一下，发现竟然很容易。

#include <stdio.h> void main(){     int a,b,c;     int *pa,*pb,*pc;     pa = &a,pv=&b,pc=&c;     scanf("%d%d",pa,pb);     printf("a=%d,b=%d\n",*pa,*pb);     c=a+b;                 printf("c=%d\n",*pc);                                         *pc=a+*pb;            printf("c=%d\n",c);     c=*pa**pb;            printf("c=%d\n",c);     c=++*pa+(*pb)++;    printf("c=%d\n",c);     c=(*pa)+++*pb;        printf("c=%d\n",c);                                     printf("a=%d,b=%d\n",a,b); } 结果：  2  3         a=2,b=3         c=5         c=5         c=6         c=6         c=7         a=4,b=4