学习C语言_指针_6_指针变量的运算

/*
指针变量不能相乘、除也不能相加。
如果两个指针变量是同一块空间中不同的单元，则这两个指针变量可以相减。
*/

# include <stdio.h>

int main(void)
{
int * p;
int * q;
int a[5];
p = &a[1];
q = &a[5];
printf("p和q所指向的单元相隔%d个单元\n\n", q-p);
}

运算结果：

.csharpcode, .csharpcode pre
{
font-size: small;
color: black;
font-family: consolas, "Courier New", courier, monospace;
background-color: #ffffff;
/*white-space: pre;*/
}
.csharpcode pre { margin: 0em; }
.csharpcode .rem { color: #008000; }
.csharpcode .kwrd { color: #0000ff; }
.csharpcode .str { color: #006080; }
.csharpcode .op { color: #0000c0; }
.csharpcode .preproc { color: #cc6633; }
.csharpcode .asp { background-color: #ffff00; }
.csharpcode .html { color: #800000; }
.csharpcode .attr { color: #ff0000; }
.csharpcode .alt
{
background-color: #f4f4f4;
width: 100%;
margin: 0em;
}
.csharpcode .lnum { color: #606060; }