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求写个c语言程序,就5分全给出去了

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求写个c语言程序,就5分全给出去了
1.从键盘上输入十个数分两行显示
2.输入十个整数求总和,求正、负数个数
3.输入a【40】,求最大(次大)元素及下标
4.输入i,j,k,计算m=i+j*k,n=根号下(m+j)/k
5.求从100-500内素数并打印
求写个c语言程序,就5分全给出去了
#include <stdio.h>                                
 
        int main() {
            int arr[10];
            int i;
            for ( i = 0; i < 9; ++ i) {
                scanf("%d",&arr[i]);
            }
 
            for ( i = 0; i < 9; ++ i) {
                if ( i % 5 == 0 ) {
                        printf("\n");
                }
                printf("%d ",arr[i]);
            }
 
            return 0;
        }
 
 
2.#include<stdio.h>
 
    int main() {
        int arr[10];
        int i;
        int numberOfOdd = 0,numberOfEven = 0;
        int sum = 0;
 
        for ( i = 0; i < 10; ++ i ) {
                scanf("%d",&arr[i]);
                sum += arr[i];              
            
                if ( arr[i] % 2 == 0 ) {  
                        numberOfOdd ++;
                }
                else {
                        numberOfEven ++;
                }
        }
 
        printf("%d %d %d\n",sum,numberOfOdd,numberOfEven);
 
        return 0;
    }