[pointer]调用函数找出一维数组中的最值，

#include <stdio.h>

void minmax(int a[], int *min, int *max, int len); //函数声明

int main()
{
    int b[] = {1, 2, 4, 7, 10, 15, 17, 20, 100, 90, -1, 1000, 20001, -99,}; //可以修改为你指定的数组
    int min, max;
    minmax(b, &min, &max, sizeof(b) / sizeof(b[0]));
    printf("max=%d, min=%d\n", max, min);
    return 0;
}

void minmax(int a[], int *min, int *max, int len)
{
    *min = *max = a[0];
    for (int i=1; i<len; i++) {
        if (*min > a[i])
            *min = a[i];
        if (*max < a[i])
            *max = a[i];
    }
}