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1、判断以下程序输出结果main(){char*p1=“name”;char*p2;p2=(char*)malloc(20);memset(p2,0,20);while(*p2++=*p1++);printf(“%s\n”,p2);}答案：Answer:emptystring.2、main(){intx=20,y=35;x=y+++x++;y=++y+++x;printf(“%d%d\n”,x,y);}Answer:57943、main(){intx=5;printf(“%d,%d,%d\n”,x,x<<2,x>>2);}Answer:5,20,13、#defineswap(a,b)a=a+b;b=a-b;a=a-b;voidmain(){intx=5,y=10;swap(x,y);printf(“%d%d\n”,x,y);swap2(x,y);printf(“%d%d\n”,x,y);}intswap2(inta,intb){inttemp;temp=a;b=a;a=temp;return0;}Answer:10,54、main(){char*ptr=”CiscoSystems”;*ptr++;printf(“%sn”,ptr);ptr++;printf(“%sn”,ptr);}Answer:iscoSystemsscoSystems5、main(){chars1[]=“Cisco”;chars2[]=“systems”;printf(“%s”,s1);}Answer:Cisco6、main(){char*p1;char*p2;p1=(char*)malloc(25);p2=(char*)malloc(25);strcpy(p1,”Cisco”);strcpy(p2,“systems”);strcat(p1,p2);printf(“%s”,p1);}Answer:Ciscosystems7、main(){intx=10,y=15;x=x++;y=++y;printf(“%d%dn”,x,y);}Answer:11,168、main(){inta=0;if(a==0)printf(“CiscoSystemsn”);printf(“CiscoSystemsn”);}Answer:Twolineswith“CiscoSystems”willbeprinted.
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