有一段程序：

#include <stdio.h>

struct Students
    {
        int num;
        int score;
    };
    
void print_under_sixty(struct Stduent *stds,int t)
{
    int i,count;
    printf("================\n");
    printf("name    score\n");
    for(i=1;i<=t;i++)
    {
        if(stds.score[i] < 60)
        {
            count++;
            printf("%d%10d\n",stds[i].num,stds[i].score);
        }
    }
    printf("the count of under sixty : %d\n",count);
}

void main()
{
    int total = 0,i;
        Students std[30];
    for(i=1;i<30;i++)
    {
        printf("student %d ",i);
        std[i].num = i;
        scanf("%d",&std[i].score);
        if(std[i].score < 0)
            break;
        total++;
    }
    printf("num    score\n");
    for(i=1;i<=total;i++)
    {
        printf("%d%10d\n",std[i].num,std[i].score);
    }
    print_under_sixty(std,total);
}

print_under_sixty里面好多错误，求大神分析

if(stds.score[i] < 60)

刚学这个东西，也不知道对不对！
void print_under_sixty(struct Students *stds,int t)
{
    int i,count=0;
    printf("================\n");
    printf("name    score\n");
    for(i=1;i<=t;i++)
    {
        if(stds[i].score < 60)
        {
            count++;
            printf("%d%10d\n",stds[i].num,stds[i].score);
        }
    }
    printf("the count of under sixty : %d\n",count);
}

void main()
{
    int total = 0,i;
      struct Students std[30];
    for(i=0;i<30;i++)
    {
        printf("student %d ",i);
        std[i].num = i+1;
        scanf("%d",&std[i].score);
        if(std[i].score < 0)
            break;
        total++;
    }
    printf("num    score\n");
    for(i=1;i<=total;i++)
    {
        printf("%d%10d\n",std[i-1].num,std[i-1].score);
    }
    print_under_sixty(std,total);
}

子函数中student写错了，看看下面的程序：
#include <stdio.h>

struct Students
    {
        int num;
        int score;
    };

void print_under_sixty(struct Students *std,int t)
{
    int count=0;
    printf("================\n");
    printf("num      score\n");
    for (int i=0;i<t;i++)
    {
        if((std->score)< 60)
        {
            count++;
            printf("%d%10d\n",std->num,std->score);
        }
        std++;    //结构体数组指针指向下一个
    }  
    printf("the count of under sixty is : %d\n",count);
}

void main()
{
    int total = 0,i;
    struct Students std0[30];
    void print_under_sixty(struct Students *std,int t);
    for(i=0;i<30;i++)
    {
        printf("student%d  ",i);
        std0[i].num = i;
        scanf("%d",&std0[i].score);
        if(std0[i].score== 0)
            break;
        total++;
    }
    printf("num     score\n");
    print_under_sixty(std0,total);
}

#include <stdio.h>
#define N 5     //这里可以换成 你想要的数值
struct Students
    {
        int num;
        int score;
    }stu[N];
   
void print_under_sixty(struct Students *stu,int t)
{
    int i,count=0;
    printf("================\n");
    printf("name    score\n");
    for(i=1;i<=t;i++)
    {
        if(stu[i].score< 60)
        {
            count++;
            printf("%d%10d\n",stu[i].num,stu[i].score);
        }
    }
    printf("the count of under sixty : %d\n",count);
}

void main()
{
    int total = 0;
    int i;
    //struct Students  stu[N];
    for(i=1;i<=N;i++)
    {
        printf("student %d ",i);
        stu[i].num=i;
        scanf("%d",&stu[i].score);
        if(stu[i].score < 0)
            break;
        total++;
    }
    printf("num    score\n");
    for(i=1;i<=total;i++)
    {
        printf("%d%10d\n",stu[i].num,stu[i].score);
    }
    print_under_sixty(stu,total);
}

可以运行，你再看看还有什么不懂得地方吧

#include <stdio.h>

struct Students
{
    int num;
    int score;
};

void print_under_sixty(struct Students *stds,int t)
{
    int i,count=0;
    struct Students *p;
    printf("================\n");
    printf("name    score\n");
    for(p=stds+1;p<=stds+t;p++)
    {
        if(p->score < 60)
        {
            count++;
            printf("%d%10d\n",p->num,p->score);
        }
    }
    printf("the count of under sixty : %d\n",count);
}

void main()
{
    int total = 0,i;
    struct Students std[30];    //定义结构变量错误

    for(i=1;i<30;i++)
    {
        printf("student %d ",i);
        std[i].num = i;
        scanf("%d",&std[i].score);
        if(std[i].score < 0)
        {
            break;              //这个将退出循环。这一步怎么想的？
        }
        total++;
    }

    printf("num    score\n");
    for(i=1;i<=total;i++)
    {
        printf("%d%10d\n",std[i].num,std[i].score);
    }
    print_under_sixty(std,total);
 }

#include <stdio.h>

struct Students
{
    int num;
    int score;
};

void print_under_sixty(struct Students *stds,int t)
{
    int i,count=0;
    printf("================\n");
    printf("name    score\n");
    for(i=1;i<=t;i++)
    {
        if(stds[i-1].score < 60)
        {
            count++;
            printf("%d%10d\n",stds[i-1].num,stds[i-1].score);
        }
    }
    printf("the count of under sixty : %d\n",count);
}

void main()
{
    int total = 0,i;
    struct Students std[30];
    for(i=0;i<30;i++)
    {
        printf("student %d ",i);
        std[i].num = i+1;
        scanf("%d",&std[i].score);
        if(std[i].score < 0)
            break;
        total++;
    }
    printf("num    score\n");
    for(i=1;i<=total;i++)
    {
        printf("%d%10d\n",std[i-1].num,std[i-1].score);
    }
    print_under_sixty(std,total);
 }

#include

struct Students
{
    int num;
    int score;
};

void print_under_sixty(struct Students *stds,int t)
{
    int i,count=0;
    printf("================\n");
    printf("name    score\n");
    for(i=1;i<=t;i++)
    {
        if(stds[i-1].score < 60)
        {
            count++;
            printf("%d%10d\n",stds[i-1].num,stds[i-1].score);
        }
    }
    printf("the count of under sixty : %d\n",count);
}

void main()
{
    int total = 0,i;
    struct Students std[30];
    for(i=0;i<30;i++)
    {
        printf("student %d ",i);
        std[i].num = i+1;
        scanf("%d",&std[i].score);
        if(std[i].score < 0)
            break;
        total++;
    }
    printf("num    score\n");
    for(i=1;i<=total;i++)
    {
        printf("%d%10d\n",std[i-1].num,std[i-1].score);
    }
    print_under_sixty(std,total);
 }

5楼的答案不错哦