如何确定我的最大输出以及如何添加最大和最小数量

2024-05-03 • 问答

这是我的代码：

#include <stdio.h>

int main()
{
    float average;
    int i,n,sum = 0,num,min,max;

    printf("Number of Students: ");
    scanf("%d",&n);

    max = min = num;

    for (i = 1; i < (n + 1); i++) {
        printf("Students no: %d\n",i);
        printf("Score: ");
        scanf("%d",&num);

        if (num > max) {
            max = num;
        }

        if (num < min) {
            min = num;
        }

        sum = sum + num;
    }

    average = 1.0*sum/n;

    printf("Average score is %.2f\n",average);
    printf("The highest score is %d\n",max);
    printf("The lowest score is %d\n",min);

    return 0;
}

问题是我的最大输出总是错误的，我也不知道我的错误。以及如何添加获得最高和最低分数的学生人数？

此声明

max = min = num;

没有意义，因为变量num没有初始化。

您的意思是以下内容。我想分数不能为负数。

#include <stdio.h>

int main()
{
    unsigned int n;

    printf( "Number of Students: " );
    scanf( "%u",&n );

    unsigned int min = 0,max = 0,count_min = 0,count_max = 0;
    unsigned int sum = 0;

    for ( unsigned int i = 0; i < n; i++ ) 
    {
        printf("Students no: %u\n",i + 1 );
        printf("Score: ");

        unsigned int num;
        scanf( "%u",&num );

        sum += num;

        if ( i == 0 || max < num ) 
        {
            max = num;
            count_max = 1;
        }
        else if ( !( num < max ) )
        {
            ++count_max;
        }

        if ( i == 0 || num < min ) 
        {
            min = num;
            count_min = 1;
        }
        else if ( !( min < num ) )
        {
            ++count_min;
        }
    }

    float average = n == 0 ? 0.0f : ( float )sum / n;

    printf( "Average score is %3.1f\n",average );
    printf( "The highest score is %u that is had by %u student(s)\n",max,count_max );
    printf( "The lowest score is %u that is had by %u student(s)\n",min,count_min );

    return 0;
}

程序输出看起来像

Number of Students: 6
Students no: 1
Score: 1
Students no: 2
Score: 4
Students no: 3
Score: 3
Students no: 4
Score: 2
Students no: 5
Score: 1
Students no: 6
Score: 3
Average score is 2.3
The highest score is 4 that is had by 1 student(s)
The lowest score is 1 that is had by 2 student(s)

在此行上

max = min = num;

将所有这些值设置为相同。但是num尚未初始化，因此这是未定义的行为。然后可能发生任何事情-该程序很可能会继续使用三个变量的垃圾值。相反，请删除此行并按如下所示初始化变量：

int i,n,sum = 0,num = 0,min = INT_MAX,max = INT_MIN;

可以将

min设置为最高有效输入。通常，您可以将其从INT_MAX设置为<limits.h>，以将其设置为最大可能值。对于max和INT_MIN也是如此。

如何确定我的最大输出以及如何添加最大和最小数量

hyx_hyx_hyx 回答：如何确定我的最大输出以及如何添加最大和最小数量

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