#include<stdio.h>int main(void

#include <stdio.h>
int main(void)
{
int sum=0,x,i,y;
printf("Input data:");
scanf("%d",&x);
if(x>=1000&&x<=9999)
{
for(i=1;i<4;i++)
{
y=x%10;
sum+=y;
if(y!=0)
printf("%d+",y);
x=x/10;
}
y=x%10;
printf("%d=%d\n",y,sum+y);
}
else printf("data error!");
return 0;
}

#include <stdio.h>
int main(void)
{
int i,j,k,n;
printf("narcissus numbers are:\n");
for (n=100;n<1000;n++)
{
i=n/100;
j=n/10%10;
k=n%10;
if (n==i*i*i+j*j*j+k*k*k)
printf("%d\n",n);
}
return 0;
}

#include <stdio.h>
#include <math.h>
int main(void)
{
int n=1,count=1;
float x;
double sum,term;
printf("Input x: "); //输入值为弧度
scanf("%f", &x);
sum=x;
term=x;
do
{
term=-term*x*x/((n+1)*(n+2));
sum=sum+term;
n=n+2;
count++;
}while(fabs(term)>=1e-5);
printf("sin(x)=%.1f,count=%d\n",sum,count);
return 0;
}

#include <stdio.h>
int main(void)
{
int num=123,x,n;
printf("hint:0<number<1000\n");
for(n=1;n<=10;n++)
{
printf("guess:");
scanf("%d",&x);
if(x==num)
{
printf("Right!\n");
break;
}
if(x>num) printf("bigger!\n");
if(x<num) printf("smaller!\n");
}
if(n==11)
printf("END! The number is %d\n",num);
return 0;
}

#include <stdio.h>
int main(void)
{
int i,j;
for(i=1;i<=4;i++)
{
for(j=10-i;j>=1;j--)
printf("%c",' ');
for(j=0;j<2*i-1;j++)
printf("*");
printf("\n");
}
for(i=3;i>=1;i--)
{
for(j=10-i;j>=1;j--)
printf("%c",' ');
for(j=0;j<2*i-1;j++)
printf("*");
printf("\n");
}
return 0;
}