#include <stdio.h>
 
int i,type;
int buffer[100],line[50];
 
struct  student
{
    char name[20];
    int age;
    int id;
};
struct student students[3];
 
int main()
{
    for(i=0;i<3;i++)
	{ 
	printf("please enter your name:\n");
    	fgets(students[i].name,sizeof(students[i].name),stdin);
 	printf("please enter your age:\n");
    	fgets(buffer,sizeof(buffer),stdin);
    	sscanf(buffer,"%d",&students[i].age); 
     	printf("please enter your id:\n");
    	fgets(buffer,sizeof(buffer),stdin);
    	sscanf(buffer,"%d",&students[i].id);
	}	
	while(1)
	{
  	int *ptr=students;
     	printf("Please enter the # for the program you want to run:\n");
  	fgets(line,sizeof(line),stdin);
  	sscanf(line,"%d",&type);
	if(type==5)
	break;
  	switch(type)
  	{
        int insertsort(int list[],*ptr) /*function to sort an array of  integers */
                         {
                      	int j, k, index; 
      		or (j=1;j<students[i-1];j++)
           		{ 
			index=list[j]; 
			k=j; 
			while ((k>0) && (list[k-1]>index)) 
			{ 
			      list[k] = list[k-1];
			      k=k-1; 
			} 
			list[k] = index; 
		} 
	} 
	case 1:/* sort by name */
 
  	case 2:/* sort by age  */
  		insertsort(students_ptr->age);
            	case 3:/* sort by id   */
     	        	insertsort(*ptr[i].id);
 
             case 4:
     printf("1-sort by name\n2-sort by age\n3-sort by id\n4-help\n5-Quit\n");
	continue;
 
             default:
		printf("enter 4 for help\n");
	             continue;
	}
             prinf("idk\n");
} 					 		    
return(0);    
}