8 for(;*p1!='\0';p1++,p2++)
9 *p2=*p1; /*当*p1=='\0'时结束循环,因此'\0'并没有复制到*p2上*/
10 *p2='\0';
11 printf("string a is:%s\n",a);
12 printf("string b is:");
13 for(i=0;b[i]!='\0';i++)
14 printf("%c",b[i]);
15 printf("\n");
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