C语言程序设计新编教程（第2版）答案第7章 指针习题答案

第七章指针习题答案7.7习题1、填空题（1）＆x，y，＆y[0]，＆y[3]，y＋3（2）p2＝p1（3）1,2（4）1，2（5）11（6）9（7）a（8）二维数组a第2行第0列的地址（9）26（10）602、单选题1-5DCDDA6-10ABCDB11-15CAAAAB16-20DACBA7.8实训7.8.1基本能力实训项目（1）调试程序并观察结果①138②0987651234③678910④162⑤Hello,worldello,world（2）编写程序①#include<stdio.h>voidmain(){voidswap(int*p1,int*p2);intn1,n2,n3;int*p1,*p2,*p3;printf("inputthreeintergern1,n2,n3");scanf("%d,%d,%d",&n1,&n2,&n3);p1=&n1;p2=&n2;p3=&n3;if(n1>n2)swap(p1,p2);if(n1>n3)swap(p1,p3);if(n2>n3)swap(p2,p3);printf("Now,theorderis:%d,%d,%d\n",n1,n2,n3);}voidswap(int*p1,int*p2){inttemp; temp=*p1;*p1=*p2;*p2=temp;}②#include<stdio.h>voidmain(){intstrmp(char*p1,char*p2);intm;charstr1[20],str2[20],*p1,*p2;printf("inputtwostrings:\n");scanf("%s",str1);scanf("%s",str2);p1=&str1[0];p2=&str2[0];m=strcmp(p1,p2);printf("result:%d\n",m);}intstrcmp(char*p1,char*p2){inti;i=0;while(*(p1+i)==*(p2+i)){if(*(p1+i++)=='\0')return(0);} return(*(p1+i)-*(p2+i));}7.8.2拓展能力实训项目①#include<stdio.h>voidmain(){voidinput(int*);voidmax_min_value(int*);voidoutput(int*);intnumber[10];input(number);max_min_value(number);output(number);}voidinput(int*number){inti;printf("input10numbers:");for(i=0;i<10;i++) scanf("%d",&number[i]);}voidmax_min_value(int*number){int*max,*min,*p,temp; max=min=number; for(p=number+1;p<number+10;p++) if(*p>*max) { max=p; temp=number[9]; number[9]=*max; *max=temp; } elseif(*p<*min) { min=p; temp=number[0]; number[0]=*min; *min=temp; }}voidoutput(int*number){int*p;printf("Now,theyare:");for(p=number;p<number+10;p++) printf("%d",*p);printf("\n");}②#include<stdio.h>voidmain(){voidmove(int[20],int,int);intnumber[20],n,m,i;printf("howmanynumber?");scanf("%d",&n);printf("input%dnumbers:",n);for(i=0;i<n;i++) scanf("%d",&number[i]);printf("howmanyplaceyouwantmove?");scanf("%d",&m);move(number,n,m);printf("Now,theyare:\n");for(i=0;i<n;i++) printf("%d",number[i]);printf("\n");}voidmove(intarry[20],intn,intm) { int*p,arry_end; arry_end=