问什么会显示答案错误（成绩改成浮点型也不对）

Question

#include<stdio.h>
#include<string.h>
struct STUDENT
{
    char a[100];
    int b;
    int c;
};
int main()
{
    int n,i,j,t;
     struct STUDENT S[1000];
     struct STUDENT axi;
    memset(S,0,1000);
    scanf("%d",&n);
    for(i=0;i<n;i++)
    scanf("%s %d %d",&S[i].a,&S[i].b,&S[i].c);
    for(i=0;i<n;i++)
    for(j=0;j<n-1-i;j++)
    {
        if(S[j].c>S[j+1].c||(S[j].c==S[j+1].c&&S[j].a[0]>S[j+1].a[0])||(S[j].c==S[j+1].c&&S[j].a[0]==S[j+1].a[0]&&S[j].b>S[j+1].b))
        {
            axi=S[j];
            S[j]=S[j+1];
            S[j+1]=axi;
        }
    }
    for(i=0;i<n;i++)
    printf("%s %d %d\n",S[i].a,S[i].b,S[i].c);
    return 0;
}

Answer 1

字符串比较用strcmp