题目内容

以下程序执行后的输出结果是_______。#inlude main(){ int a=2,b=7,c=5;switch(a>0){case 1:switch(b<10){ case 1: printf("@");break;case 0: printf("!");break;}case 0:switch(c==5){ case 0: printf("*");break;case 1: printf("#");break;default: printf("%");break; }default:{ case 1: printf();break; printf("&");}printf("\n");}

A. !*
B. @!
C. @%
D. @
E. &

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若有定义：float x=1.5;

A. switch(a+b){ case 1: printf("*\n");case 2+1: printf("**\n"); }
B. switch((int)x);{ case 1: printf("*\n");case 2: printf("**\n"); }
C. switch(x){ case 1.0: printf("*\n");case 2.0: printf("**\n"); }
D. switch(a+b){ case 1: printf("*\n");case c: printf("**\n"); }

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有以下程序

A. 2
B. 0
C. 1
D. 3

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若运行时输入：16,则以下程序的运行结果是#include void main(void){intyear;printf("Inputyour year:");scanf("%d",&year);if(year>=18)printf("your$4.5 yuan/xiaoshi");elseprintf("your$3.0 yuan/xiaoshi"); }

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若运行时输入：2,则以下程序的运行结果是#include void main(void){char class;printf("Enter 1 for 1st class post or 2 for 2nd post");scanf("%c",&class);if (class=='1')printf("1st class postage is 19p");elseprintf("2nd class postage is 14p"); 。）}

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A. !* B. @! C. @% D. @ E. &

若有定义：float x=1.5;

有以下程序

若运行时输入：16,则以下程序的运行结果是#include void main(void){intyear;printf("Inputyour year:");scanf("%d",&year);if(year>=18)printf("your$4.5 yuan/xiaoshi");elseprintf("your$3.0 yuan/xiaoshi"); }

若运行时输入：2,则以下程序的运行结果是#include void main(void){char class;printf("Enter 1 for 1st class post or 2 for 2nd post");scanf("%c",&class);if (class=='1')printf("1st class postage is 19p");elseprintf("2nd class postage is 14p"); 。 ）}

A. !*
B. @!
C. @%
D. @
E. &

若运行时输入：2,则以下程序的运行结果是#include void main(void){char class;printf("Enter 1 for 1st class post or 2 for 2nd post");scanf("%c",&class);if (class=='1')printf("1st class postage is 19p");elseprintf("2nd class postage is 14p"); 。）}