7-14 sum integer segments (C language)

Given two integers A and B, Output from A To B All the integers of and the sum of these numbers .

Input format ：
Enter... On one line 2 It's an integer A and B, among −100≤A≤B≤100, Separated by spaces .

Output format ：
First, output sequentially from A To B All integers of , Every time 5 A line of numbers , Each number accounts for 5 Character width , Align right . Finally, in a line, press Sum = X Output the sum of all the numbers X.

sample input ：
-3 8
sample output ：
   -3   -2   -1    0    1
    2    3    4    5    6
    7    8
Sum = 30
PS: 
        It is a problem of counting and summing cycles . Test point 1 If not , There is a problem with the output format , Output one more line feed . Note that when the number of output numbers is 5 The integral times of , There may be more than one line feed output , Therefore, there is no need to wrap the last line .

Attach code ：

#include <stdio.h>
 
int main(){
    int a,b,i;
    int sum = 0;
    int couter = 0;    // To count  
    scanf("%d %d",&a,&b);
    for(i=a;i<=b;i++){        //i Used to record output numbers  
        sum += i;
        couter++;       
        printf("%5d",i);     // Output 5 Characters  
        if(couter%5 == 0 && i!=b){   // When the count reaches 5 When it's time , It's a new line , And the last line does not need to wrap 
            printf("\n");
        }
    }
    printf("\n");            
    printf("Sum = %d",sum);
    return 0;
}