scanfscore()函数用于输入学生的成绩

int scanfscore(int score[N])//输入学生的成绩
{
	int i = -1;
	do {
		i++;
		printf("输入学生成绩:");
		scanf("%d", &score[i]);
	} while (score[i] >= 0);
	return i;
}

findmax()用于寻找最大值

int findmax(int score[N], int n)
{
	int max =score[0];
	int i = 0;
	int maxIndex = 0;
	for (i = 1; i < n; i++)
	{
		if (score[i] > max)
		{
			max = score[i];
			maxIndex = i;
		}	
	}
	return maxIndex;
}

完整代码

#include<stdio.h>
#define N 40
int scanfscore(int score[N])//输入学生的成绩
{
	int i = -1;
	do {
		i++;
		printf("输入学生成绩:");
		scanf("%d", &score[i]);
	} while (score[i] >= 0);
	return i;
}
int findmax(int score[N], int n)
{
	int max =score[0];
	int i = 0;
	int maxIndex = 0;
	for (i = 1; i < n; i++)
	{
		if (score[i] > max)
		{
			max = score[i];
			maxIndex = i;
		}	
	}
	return maxIndex;
}
int main()
{
	int score[N];
	int n = 0;
	int maxi = 0;
	int i = 0;
	int temp = 0;
	n = scanfscore(score);
	printf("有%d个同学\n", n);
	maxi = findmax(score, n);
	printf("最大值的数组下标为%d\n", maxi);
	printf("最高分为%d",score[maxi]);
	return 0;
}