項目1:
#include <stdio.h>
int main()
{
int n=1,total=0;
while(n<=500)
{
total = total+2*n;
n++;
}
printf("%d",total);
return 0;
}
#include <stdio.h>
int main()
{
int n,total=0;
for(n=1;n<=500;n++)
{
total = total+2*n;
}
printf("%d",total);
return 0;
}
#include <stdio.h>
int main()
{
int n=1,total=0;
do
{
total = total+2*n;
n++;
}
while(n<=500);
printf("%d",total);
return 0;
}
項目2:
#include <stdio.h>
int main()
{
double n,m,factorial=1;
printf("Please enter the value of n:");
scanf("%lf",&n);
for(m=1;m<=n;m++)
factorial = factorial*m;
printf("factorial=%.0lf",factorial);
return 0;
}
項目3:
//輸出1000以內能被3整除且個位數爲6的所有整數
#include <stdio.h>
int main()
{
int i,j;
for(i=0;i<100;i++)
{
j = i*10+6;
if(j%3==0)
printf("%d\n",j);
}
printf("\n");
return 0;
}