Программирование на C / C++ / Лабораторная работа №41 / #4

#include<stdlib.h>
#include<string.h>
#include<fstream.h>
#include<conio.h>
#include<stdio.h>
struct materials{
char caption[20];
int mass;
int res;
}p[50],tmp;


int n,res_n;
char file_name[15],author[20];
void init_base(char *name){
ifstream inp_file(name);
if (!inp_file)
		{ printf("Frror!!! File not found! Press any key to exit.");
		  getch();
		  exit(1);
		  return;
		}
n=-1;
while (!inp_file.eof())
	{
	n++;
	inp_file>>p[n].caption>>p[n].res>>p[n].mass;
	}
inp_file.close();
}

int check(int param,int i, int j)
{
switch (param)
	{
	case 1:{if (strcmp(p[i].caption,p[j].caption)>0)    return(1);else return(0);}
	case 2:{if (p[i].res>p[i].res)   return(1);else return(0);}
	case 3:{if (p[i].mass>p[i].mass) 	          return(1);else return(0);}
	}
return(0);
}

void sort()
{
int param;
printf("enter # of column by witc you want to sort: ");
cin>>param;
if (param>3)
	{
	printf("Error!!! Incorrect value! Press any key to exit");
	getch();
	exit(1);
	}
int min;
for (int i = 0; i <n-1; i++)
	{
	int min = i;
	for (int j = i+1; j <n; j++)
		if (check(param,min,j)) min = j;
	tmp=p[i];
	p[i]=p[min];
	p[min]=tmp;
	}
}


void save(){
for (int j=0;j<n;j++)
printf("%10s %3i %3i\n",p[j].caption,p[j].res,p[j].mass);
getch();
}
void main(){
clrscr();
printf("Enter filename:");
scanf("%s",file_name);
init_base(file_name);
sort();
save();
}