第六次作业

#include<stdio.h>
main(){
    int i=1;int sum=0;
    while(i<=21)
    {sum+=i;
    i+=2;
    }
    printf("sum=%d\n",sum);
}

 

#include<stdio.h>
main(){
    int i=1;double sum=0;
    int n;scanf("%d",&n);
    while(i<=n)
    {
        sum+=1.0/i;
        i+=2;
    }
    printf("sum=%f\n",sum);
}

 

#include<stdio.h>
main(){
    int i=1,f=1;
    int n;scanf("%d",&n);
    while(i<=n)
    {
    f*=i;
    i++;
    }
    printf("f=%ld\n",f);
}

 

#include<stdio.h>
main(){
    int a,b,c;
    int i=100;
    while(i<1000)
    {
        a=i/100;
        b=i%100/10;
        c=i%10;
        if(i==a*a*a+b*b*b+c*c*c)
            printf("%4d\n",i);
        i++;
    }
}

 

#include<stdio.h>
main(){
    int a,b,i;
    scanf("%d%d",&a,&b);
    i=a+1;
    while(i<=b-1){
        printf("%d\n",i);
        i++;
    }
}

 

#include<stdio.h>
main(){
    int i,sum=0;
    for(i=1;i<=100;i++)
    {
        if(i%3==0&&i%5==0)
        {
            sum=sum+i;
        }
    }
    printf("sum=%d\n",sum);
}