/* 标准文档模板 */

#include "Stdio.h"
#include "Conio.h"

int main(void)
{
  int n=0,i=1,j=0,k=1,s=0,cho=0;
  float marks[150][3],temp[150][3],t1=0,t2=0,t3=0,aver1=0,aver2=0,aver3=0,sum1=0,sum2=0,sum3=0;
  char xh[150][99],name[150][99];
  printf("\t\t***Student Performance Management System***\n");
  /*学生学号、姓名、成绩的输入*/
  printf("Enter the total number of students:\n");
  scanf("%d",&n);
  getchar();
  for(i=1;i<=n;i++)
  {
  printf("Enter student %d's NO.:",i);
  scanf("%s",&xh[i-1]);
  getchar();
  printf("Enter student &d's name:",i);
  scanf("%s",&name[i-1]);
  getchar();
  printf("Enter student %d's first subject score:",i);
  scanf("%f",&marks[i-1][0]);
  getchar();
  printf("Enter student %d's second subject score:",i);
  scanf("%f",&marks[i-1][1]);
  getchar();
  printf("Enter student %d's third subject score:",i);
  scanf("%f",&marks[i-1][2]);
  getchar();
  }
  /*功能模块的选择*/
x:printf("\nChoose the function module:\n");
  printf("1.Calculate the max,min,aver for each subject.\n");
  printf("2.Calculate the max,min,aver for each student,and print in order.\n");
  printf("3.Calculate the excellent rate and failure rate for each subject,and print graphicly.\n");
  scanf("%d",&cho);
  getchar();

  /*保护原始数据*/
  s=n;
  for(i=1;i<=150;i++)
  {
     for(k=1;k<=3;k++)
     {
     temp[i-1][k-1]=marks[i-1][k-1];
     }

  }

  switch(cho)
  {
  /*计算每科的最高、最低及平均分*/
  case 1:
         printf("%f",temp);
         for(k=1;k<=n-1;k++)
         {
            for(j=0;j<=s-2;j++)
            {
             if(temp[j][0]>temp[j+1][0])
             {
              t1=temp[j][0];temp[j][0]=temp[j+1][0];temp[j+1][0]=t1;
             }
             if(temp[j][1]>temp[j+1][1])
             {
              t2=temp[j][1];temp[j][1]=temp[j+1][1];temp[j+1][1]=t2;
             }
             if(temp[j][2]>temp[j+1][2])
             {
              t3=temp[j][2];temp[j][2]=temp[j+1][2];temp[j+1][2]=t3;
             }
            }
            s--;
         }
         for(k=1;k<=n;k++)
         {
          sum1=sum1+temp[k-1][0];
          sum2=sum2+temp[k-1][1];
          sum3=sum3+temp[k-1][2];
         }
         aver1=sum1/n;
         aver2=sum2/n;
         aver3=sum3/n;
         printf("\n\nThe first subject's max,min,aver:%f,%f,%f\n",temp[n-1][0],temp[0][0],aver1);
         printf("The second subject's max,min,aver:%f,%f,%f\n",temp[n-1][1],temp[0][1],aver2);
         printf("The third subject's max,min,aver:%f,%f,%f\n",temp[n-1][2],temp[0][2],aver3);
         printf("\nPress any key to turn back to the main menu...\n");
         getch();
         goto x;
         break;
  /*计算每人的最高、最低及平均分，并按平均分排序*/
  case 2:

         break;
  /*计算每科的优秀率和不及格率，并图形化输出*/
  case 3:

         break;
  /*错误处理*/
  default:printf("\nerror!\n");goto x;
  }
  getch();
  return 0;
}
没编完，只完成了第一个模块。
问题是运行到printf("Enter student &d's name:",i);
  scanf("%s",&name[i-1]);
  getchar();
后自动结束。下面无法继续。
在把紧接着后面的“%f”改成“%d”后，不会结束，但结果不对。