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/*компоненты бинарного файла-записи,
состоящие из четырех чисел-координат центра кольца и его внешнего и внутреннего радиусов.
Определить, какое кольцо имеет наибольшую площадь, какое-наименьшую.*/
#include <stdio.h>
#include <stdlib.h>
#define N 9
int InputStruct(int,);
void OutputStruct(struct);
int SeachMaxMin(,int);
struct {
           float x, y, r, R;
           int NumerRing;
       } ringArr[N],*pRing;
 
int main(void)
{
    int i,number;
    char filename[15];
    FILE *pFile;
    puts("input filename");
    gets(filename);
    if((pFile=fopen(filename,"a+b"))==NULL)
    {
        printf("can't open '%s'",filename);
        return 1;
    }
    do
    {
        printf("input number rings(no bigger %d):",N);
        scanf("%d",&number);
    }
    while(number<0 && number>N);
    printf("input parametes your ring");
    for(i=0;i<number;i++)
    {
        InputStruct(i,);
        OutputStruct();
    }
    fwrite(*pRing,sizeof(*pRing),pFile);
    fread(*pRing,sizeof(*pRing),pFile);
    SeachMaxMin();
    fclose(pFile);
    return 0;
}
int InputStruct(int i,)
{
    pRing->NumberRing=i+1;
    scanf("%*c");
    puts("enter x:");
    scanf("%f\n",&(pRing->x));
    puts("enter y:");
    scanf("%f", &(pRing->y));
    puts("enter internal radius:");
    scanf("%f\n",&(pRing->r));
    puts("enter external radius:");
    scanf("%f\n",&(pRing->R));
    return 0;
}
void OutputStruct(struct ring *pStruct)
{
    printf("\nNumber ring:%d\tx=%f\ty=%d\tr=%d\tR=%d\t\n",pRing->NumberRing,pRing->x,pRing->y,pRing->r,pRing->R);
    return;
}
int SearchMaxMin(*pStruct,int n)
{
    for(i=0;i<n;i++)
    {
 
    }
    return 1;
}
 

prog.c:7:21: error: expected declaration specifiers or '...' before ')' token
 int InputStruct(int,);
                     ^
prog.c:8:25: error: expected '{' before ')' token
 void OutputStruct(struct);
                         ^
prog.c: In function 'main':
prog.c:21:5: warning: implicit declaration of function 'gets' [-Wimplicit-function-declaration]
     gets(filename);
     ^
prog.c:36:9: warning: implicit declaration of function 'InputStruct' [-Wimplicit-function-declaration]
         InputStruct(i,);
         ^
prog.c:36:23: error: expected expression before ')' token
         InputStruct(i,);
                       ^
prog.c:37:9: error: too few arguments to function 'OutputStruct'
         OutputStruct();
         ^
prog.c:8:6: note: declared here
 void OutputStruct(struct);
      ^
prog.c:39:12: error: incompatible type for argument 1 of 'fwrite'
     fwrite(*pRing,sizeof(*pRing),pFile);
            ^
In file included from prog.c:4:0:
/usr/include/stdio.h:715:15: note: expected 'const void * restrict' but argument is of type 'struct <anonymous>'
 extern size_t fwrite (const void *__restrict __ptr, size_t __size,
               ^
prog.c:39:34: warning: passing argument 3 of 'fwrite' makes integer from pointer without a cast [-Wint-conversion]
     fwrite(*pRing,sizeof(*pRing),pFile);
                                  ^
In file included from prog.c:4:0:
/usr/include/stdio.h:715:15: note: expected 'size_t {aka unsigned int}' but argument is of type 'FILE * {aka struct _IO_FILE *}'
 extern size_t fwrite (const void *__restrict __ptr, size_t __size,
               ^
prog.c:39:5: error: too few arguments to function 'fwrite'
     fwrite(*pRing,sizeof(*pRing),pFile);
     ^
prog.c:40:11: error: incompatible type for argument 1 of 'fread'
     fread(*pRing,sizeof(*pRing),pFile);
           ^
In file included from prog.c:4:0:
/usr/include/stdio.h:709:15: note: expected 'void * restrict' but argument is of type 'struct <anonymous>'
 extern size_t fread (void *__restrict __ptr, size_t __size,
               ^
prog.c:40:33: warning: passing argument 3 of 'fread' makes integer from pointer without a cast [-Wint-conversion]
     fread(*pRing,sizeof(*pRing),pFile);
                                 ^
In file included from prog.c:4:0:
/usr/include/stdio.h:709:15: note: expected 'size_t {aka unsigned int}' but argument is of type 'FILE * {aka struct _IO_FILE *}'
 extern size_t fread (void *__restrict __ptr, size_t __size,
               ^
prog.c:40:5: error: too few arguments to function 'fread'
     fread(*pRing,sizeof(*pRing),pFile);
     ^
In file included from prog.c:4:0:
/usr/include/stdio.h:709:15: note: declared here
 extern size_t fread (void *__restrict __ptr, size_t __size,
               ^
prog.c:41:5: warning: implicit declaration of function 'SeachMaxMin' [-Wimplicit-function-declaration]
     SeachMaxMin();
     ^
prog.c: At top level:
prog.c:45:23: error: expected declaration specifiers or '...' before ')' token
 int InputStruct(int i,)
                       ^
prog.c:59:26: warning: 'struct ring' declared inside parameter list
 void OutputStruct(struct ring *pStruct)
                          ^
prog.c:59:26: warning: its scope is only this definition or declaration, which is probably not what you want
prog.c:59:6: error: conflicting types for 'OutputStruct'
 void OutputStruct(struct ring *pStruct)
      ^
prog.c:8:6: note: previous declaration of 'OutputStruct' was here
 void OutputStruct(struct);
      ^
prog.c: In function 'OutputStruct':
prog.c:61:64: error: 'struct <anonymous>' has no member named 'NumberRing'
     printf("\nNumber ring:%d\tx=%f\ty=%d\tr=%d\tR=%d\t\n",pRing->NumberRing,pRing->x,pRing->y,pRing->r,pRing->R);
                                                                ^
prog.c: At top level:
prog.c:64:18: error: expected declaration specifiers or '...' before '*' token
 int SearchMaxMin(*pStruct,int n)
                  ^

Standard output is empty