超星 - 期中测验 - 查题吧

填空题

以下程序的输出结果是。#include int main(){ int a=2,b=7,c=5;switch(a>0){case 1:switch(b<0){case 1:printf("@");break;case 2:printf("!");break;}case 0:switch(c==5){case 0:printf("*");break;case 1:printf("#");break;default:printf("#");break;}default:printf("&");}printf("\n");return 0;}

填空题

以下程序的输出结果是。#include int main(){ int x,y;x=5switch(x){case 1:case 2:case 3:case 4: printf("x<5\n");case 5: printf("x=5\n",x);default:printf("The value of x is unknown.\n");}return 0;}

填空题

若运行以下程序时输入：6 3 1<回车>,则程序的运行结果是。#include #include int main ( ){double a,b,c,disc,x1,x2,p,q;scanf("%lf%lf%lf",&a,&b,&c);disc=bb-4a*c;if (disc<0)printf("This equation hav't real roots\n");else{ p=-b/(2.0a);q=sqrt(disc)/(2.0a);x1=p+q;x2=p-q;printf("real roots:\nx1=%7.2f\nx2=%7.2f\n",x1,x2);}return 0;}

填空题

若运行以下程序时输入：2 4 1<回车>,则程序的运行结果是。#include #include int main ( ){double a,b,c,disc,x1,x2,p,q;scanf("%lf%lf%lf",&a,&b,&c);disc=bb-4a*c;if (disc<0)printf("This equation hav't real roots\n");else{ p=-b/(2.0a);q=sqrt(disc)/(2.0a);x1=p+q;x2=p-q;printf("real roots:\nx1=%7.2f\nx2=%7.2f\n",x1,x2);}return 0;}

填空题

若运行以下程序时输入：3.6,-3.2<回车>,则程序的运行结果是。#include int main(){float a,b,t;scanf("%f,%f",&a,&b);if(a>b){t=a;a=b;b=t;}printf("%5.2f,%5.2f\n",a,b);return 0;}

填空题

若运行以下程序时输入：3,7,1<回车>,则程序的运行结果是。#include int main(){float a,b,c,t;scanf("%f,%f,%f",&a,&b,&c);if(a>b){t=a;a=b;b=t;}if(a>c){t=a;a=c;c=t;}if(b>c){t=b;b=c;c=t;}printf("%5.2f,%5.2f,%5.2f\n",a,b,c);return 0;}

填空题

若运行以下程序时输入：A<回车>,则程序的运行结果是。#include int main(){char ch;scanf("%c",&ch);ch=(ch>='A' && ch<='Z') ? (ch+32) : ch;printf("%c\n",ch);return 0;}

填空题

若运行以下程序时输入：-5<回车>,则程序的运行结果是。#include int main(){int x,y;scanf("%d",&x);if(x<0)y=-1;elseif(x==0) y=0;else y=1;printf("x=%d,y=%d\n",x,y);return 0;}

填空题

若运行以下程序时输入：5<回车>,则程序的运行结果是。#include int main(){int x,y;scanf("%d",&x);if (x>=0)if (x>0) y=1;else y=0;else y=-1;printf("x=%d,y=%d\n",x,y);return 0;}

填空题

若运行以下程序时输入：A<回车>,则程序的运行结果是。#include int main(){char grade;scanf("%c",&grade);printf("Your score:");switch(grade){case 'A': printf("85～100\n");break;case 'B': printf("70～84\n");break;case 'C': printf("60～69\n");break;case 'D': printf("<60\n");break;default: printf("data error!\n");}return 0;}

8