1:(1)c!='\n' (2) c>='0'&&c<='9'
2:(1)r=n%m (2) m%n
3:(1)i%4==0 (2) printf("\n");
4:
#include<stdio.h>int?main(void)
{
int?x,y;
printf("x=");
scanf("%d",&x);
switch(x)
{
case?x<0:y=-1;break;
case?x=0:y=0;break;
case?x>0:y=1;break;
}
printf("y=%d\n",y);
return?0;
}
5:
#include<stdio.h>
int?main(void)
{
int?i,j,x,a[3];
for(i=100;i<1000;i++)
{
for(j=2;j>=0;j--)
{
x=i;
a[j]=x%10;
x=x/10;
}
if(i==a[0]*a[0]*a[0]+a[1]*a[1]*a[1]+a[2]*a[2]*a[2])
printf("%d?",i);
}
printf("\n");
return?0;
} 6:
#include<stdio.h>
int main(void)
{
float h=100,s=0;
int count=0;
while(count++<10)
{
if(count==1)
s+=h;
else
s+=2*h;
h/=2;
}
printf("%f\t%f\n",s,h);
return 0;
}