题目内容

6、输入AB下列程序的运行结果是____。#includemain(){int a,b;char c1,c2;printf("please input c1 and c2:\n");scanf("%c%c",&c1,&c2);printf("c1=%d,c2=%d\n",c1-1,c2-1);}

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若int i=10;,则执行下列程序段后,变量i的正确结果是____。switch(i){ case 9: i+=1;case 10: i+=1;case 11: i+=1;default: i+=1;}

程序填空:下列程序实现的功能是输入某年某月某日,输出是这一年的第几天。#includevoid main(){int days;int data_year,data_month,data_day;printf("请输入日期(年,月,日):");scanf("%d, %d, %d", &data_year, &data_month, &data_day);switch(data_month){case 1:days = data_day;break;case 2:days = data_day+;break;case 3:days = data_day+59;break;case 4:days = data_day+90;break;case 5:days = data_day+;break;case 6:days = data_day+151;break;case 7:days = data_day+181;break;case 8:days = data_day+212;break;case 9:days = data_day+243;break;case 10:days = data_day+273;break;case 11:days = data_day+304;break;case 12:days = data_day+334;break;}if(data_year%4==0&&data_year%100!=0data_year%400==0)if(data_month>=3)days =;printf("%d月%d日是%d年的第%d天.\n", data_month, data_day, data_year, days);}

执行下面的程序段的时间复杂度为（）。for(int i=0;i

A. O(m+n)
B. O(m2)
C. O(n2)
D. O(m*n)

执行下面程序段时，语句S的执行次数为（）。for(int i=0;i<=n;i++)for(int j=0;j<=i;j++)S;

A. n*n
B. (n+1)*(n+2)/2
C. n(n+1)/2
D. n*n/2