C sample

sample.c

#include <stdio.h>
#define N 7

int min(int* nums, int len);
int max(int* nums, int len);
int first_appear(int* nums, int len, int target);

int main(int argc, char* argv[])
{
    int i, len, target;
    int nums[N];
    for (i = 0; i < N; i++) {
        printf("input a[%d]: ",i);
        scanf("%d",&nums[i]);
    }
    len = sizeof(nums) / sizeof(nums[0]);
    printf("min : %d\n", target = min(nums, len));
    printf("first min  number is at %d\n", first_appear(nums, len, target));
    printf("max : %d\n", target = max(nums, len));
    printf("first max  number is at %d\n", first_appear(nums, len, target));
    return 0;
}

int first_appear(int* nums, int len, int target)
{
    int i;
    for (i=0; i < len; i++) {
        if (target == nums[i]) {
            return i;
        }
    }
    return 0;
}

int min(int* nums, int len)
{
    int* data;
    int temp = nums[0];
    for (data = nums; data != &nums[len]; data++) {
        if (temp > *data) {
            temp = *data;
        }
    }
    return temp;
}

int max(int* nums, int len)
{
    int temp = nums[0];
    int* data;
    for (data = nums; data != &nums[len]; data++) {
        if (temp < *data) {
            temp = *data;
        }
    }
    return temp;
}