Day1 hdoj 1089-1096 problem, day11089-1096

Day1 hdoj 1089-1096 problem, day11089-1096

First step into ACM learning, I have to strongly recommend a set of videos

Https://space.bilibili.com/3071253!

The video of the up Master is very similar to me.

I have never learned c ++, but I still don't know much about the c language array.

First, the basic input/output format is 1089-1096.

The following code is provided. Search for the original question by yourself.

1089

#include<stdio.h>int main(){    int a,b;    while(scanf("%d%d",&a,&b)!=EOF)    printf("%d\n",a+b);      return 0;}

This is the most basic a + B problem

The only clever thing is

    while(scanf("%d%d",&a,&b)!=EOF)

EOF is end of file

In general, the meaning of this Code is

You can always enter a and B values without stopping.

If it is normal

scanf("%d%d",&a,&b);

After a value of a + B is calculated, the program terminates.

1090

#include<stdio.h>int main(){    int a,b,n;    scanf("%d",&n);        while(n>0)    {        n--;        scanf("%d%d",&a,&b);        printf("%d\n",a+b);    }    return 0;}

In particular, you can enter a number n to control the number of groups that can be entered.

The feature code here is

while(n>0)    {        n--;   }

Please follow the video to understand

1091

#include<stdio.h>int main(){    int a,b;    while(scanf("%d%d",&a,&b)!=EOF)    {        if(a==0&&b==0) break;        printf("%d\n",a+b);    }    return 0;}

This topic is special

If the input is 0, the program is terminated.

In the code, break indicates that the while LOOP jumps out and returns 0; that is, the program is terminated.

1092

# Include <stdio. h> int main () {int a, n; while (scanf ("% d", & n )! = EOF) {if (n = 0) break; int sum = 0; // pay special attention to the position where sum is assigned 0 while (n> 0) {n --; scanf ("% d", & a); sum + = a;} printf ("% d \ n", sum);} return 0 ;}

This topic is special

Specifies the number of numbers entered in each group.

Same principle as question 1090

1093

#include<stdio.h>int main(){    int a,n,i;    scanf("%d",&i);    while(i>0)    {        i--;    scanf("%d",&n);    {        if(n==0) break;        int sum=0;        while(n>0)            {n--;            scanf("%d",&a);            sum+=a;            }        printf("%d\n",sum);    }    }    return 0;}

1090 and 1092

Specify the number of groups and the number of numbers in each group

Use twice while.

1094

#include<stdio.h>int main(){    int a,n;    while(scanf("%d",&n)!=EOF)    {        int sum=0;        while(n--){        scanf("%d",&a);        sum+=a;        }        printf("%d\n",sum);    }    return 0;}

Water

Only the AC code is provided.

1095

#include<stdio.h>int main(){    int a,b;    while(scanf("%d%d",&a,&b)!=EOF)    printf("%d\n\n",a+b);    return 0;}

Output by line

Similarly, only the AC code is provided.

1096

#include<stdio.h>int main(){    int n,i,a;    scanf("%d",&n);    while(n--)    {        scanf("%d",&i);        int sum=0;        while(i--)        {            scanf("%d",&a);            sum+=a;        }        if(n>0)        printf("%d\n\n",sum);        else        printf("%d\n",sum);    }    return 0;}

Overall

Note that PE appears when printf ("% d \ n", sum) is directly typed for the first time.

The format may end with \ n.

If you are not sure, we recommend that you use 1096 output code.