6. C编程 - 显示一个数字的因数
#include <stdio.h>
int main()
{
int n,i;
printf("Enter a positive integer: ");
scanf("%d",&n);
printf("Factors of %d are: ", n);
for(i=1;i<=n; i)
{
if(n%i==0)
printf("%d ",i);
}
return 0;
}
7. C编程 - 检查质数
#include <stdio.h>
int main()
{
int n, i, flag = 0;
printf("Enter a positive integer: ");
scanf("%d",&n);
for(i=2; i<=n/2; i)
{
// condition for nonprime number
if(n%i==0)
{
flag=1;
break;
}
}
if (flag==0)
printf("%d is a prime number.\n",n);
else
printf("%d is not a prime number.\n",n);
return 0;
}
8.C编程 - 检查闰年
#include<stdio.h>
int main()
{
int year;
printf("Enter a year: ");
scanf("%d",&year);
if(year%4 == 0)
{
if( year0 == 0)
{
// year is divisible by 400, hence the year is a leap year
if ( year@0 == 0)
printf("%d is a leap year.\n", year);
else
printf("%d is not a leap year.\n", year);
}
else
printf("%d is a leap year.\n", year );
}
else
printf("%d is not a leap year.\n", year);
return 0;
}
9.C编程 - 从1加到n的和
#include<stdio.h>
int main()
{
int i,n,sum=0;
printf("Upto how many terms you want to find the sum:");
scanf("%d",&n);
for(i=1;i<=n;i ){
sum = sum i;
}
printf("Sum is %d\n",sum);
return 0;
}
