题解 | 单组_一维数组

#include <stdio.h>
#include<stdlib.h>
long long sum(long long* p,int n)
{
    long long ans = 0;
    int i = 0;
    for(i = 0;i<n;i++)
    {
        ans+=p[i];
    }
    return ans;

}
int main()
{
    int n = 0;
    scanf("%d",&n);
    int i = 0;
    long long* arr = (long long*)calloc(n,sizeof(long long));
    for(i = 0;i<n;i++)
    {
        scanf("%lld",&arr[i]);
    }
    long long ret = sum(arr,n);
    printf("%lld\n",ret);
    free(arr);
    arr = NULL;
    return 0;

}