{
int n=0
float i,j,k
while(n!=5)
printf("please choose:\n")
printf("1:plus\n2:substract\n3:multiply\n4:divide\n5:exit\n")
scanf("%d",&n)
printf("please input two number:")
scanf("%f",&i)
scanf("%f",&j)
swich(n)
{case 1:
printf("i+j=",i+j)
break
case 2:printf("i-j=",i-j)
break
case 3:printf("i*j=",i*j)
break
case 4:printf("i/j=",i/j)
break
case 5:exit(1)break
default: printf("Input error,please input again!")
}
}
}
1. x>0 x>=02. x=y y=temp
3. m%i==0 i>k
4. n/100 i*i*i+j*j*j+k*k*k
4. c=getchar() n++
5. if(k>s) printf("%5d",n) m>0 m=m/10
15. -2
16. 无法解答
17. B
18. 48,0
最快的方法还是百度,你懂的
19. C
21. A