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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
 
typedef struct storage{
    char isbn[18];
    int vendite;
    int acquisti;
    int data;
}libr[100];
 
int main(int argc,char *argv[])
{
 
    FILE *f;
    char isbn[18],data[11],acq_vendita,str[100],isbn_max=0,isbn_min=0;
    int n_copie=0,i,copie_vendute=0,gg=0,mm,yyyy=0,settembre=0,ottobre=0,novembre=0,dicembre=0,v_max,flag=0,j;
    float prezzo=0;
 
 
    if(argc!=2){
        printf("errore inserimento parametri");
        return 1;
    }
 
    if((f=fopen(argv[1],"r"))==NULL){
        fprintf(stderr,"errore apertura file");
        return 2;
    }
 
    while(fgets(str,100,f)!=NULL){
        sscanf(str,"%s %s %s %d %f", isbn, acq_vendita, data, &n_copie, &prezzo);
 
    i=0;
        for(j=0;j<100;j++){
        if((strcmp(isbn,libr[i].isbn))== 0){
                if(acq_vendita=='V')
 
 
 
                n_copie++;
            }
            }
            printf("Copie in magazzino %d , copie vendute %d",
                   n_copie,copie_vendute);
 
    }
 
 if(acq_vendita=='V'){
        sscanf(data,"%*d%d%*d",&mm);
       switch (mm)
            case 9:
                    settembre+=n_copie;
                    break;
 
            case 10:
                    ottobre+=n_copie;
                    break;
 
            case 11:
                    novembre+=n_copie;
                    break;
 
            case 12:
                    dicembre+=n_copie;
                    break;
 
            default:
                    printf("Il mese inserito non coincide col periodo vendita\n");
                    printf("Inserisci un altro mese");
   }
   }
 
    printf("Le copie vendute a settembre sono %d",settembre);
    printf("Le copie vendute a ottobre sono %d",ottobre);
    printf("Le copie vendute a novembre sono %d",novembre);
    printf("Le copie vendute a dicembre sono %d",dicembre);
 
 
    for(i=0;i<100;i++){
        if(libr[i].vendite>v_max){
                v_max=libr[i].vendite;
            j=i;
                }
                printf("isbn associato %s",libr[i].isbn);
 
        }
}
printf("Numero di copie vendute per l'isbn %s e': %d",libr[i].isbn,v_max);
    return 0;
}
 

prog.c: In function ‘main’:
prog.c:32:9: warning: format ‘%s’ expects argument of type ‘char *’, but argument 4 has type ‘int’ [-Wformat]
prog.c:36:13: error: expected expression before ‘libr’
prog.c:36:13: error: expected expression before ‘libr’
prog.c:36:13: error: expected ‘)’ before ‘.’ token
prog.c:36:13: error: cast specifies array type
prog.c:36:13: error: expected ‘)’ before ‘.’ token
prog.c:36:13: error: expected expression before ‘==’ token
prog.c:36:13: warning: left-hand operand of comma expression has no effect [-Wunused-value]
prog.c:36:13: error: expected expression before ‘libr’
prog.c:36:13: error: expected expression before ‘libr’
prog.c:36:13: error: expected ‘)’ before ‘.’ token
prog.c:36:13: error: cast specifies array type
prog.c:36:13: error: expected ‘)’ before ‘.’ token
prog.c:36:13: error: expected expression before ‘==’ token
prog.c:36:13: error: expected expression before ‘libr’
prog.c:36:13: error: expected ‘)’ before ‘.’ token
prog.c:36:13: error: expected expression before ‘;’ token
prog.c:36:13: error: expected expression before ‘libr’
prog.c:36:13: error: expected ‘)’ before ‘.’ token
prog.c:36:13: error: cast specifies array type
prog.c:36:13: error: expected ‘)’ before ‘.’ token
prog.c:36:13: error: expected expression before ‘==’ token
prog.c:36:13: error: expected expression before ‘libr’
prog.c:36:13: warning: left-hand operand of comma expression has no effect [-Wunused-value]
prog.c:36:13: error: expected expression before ‘libr’
prog.c:36:13: error: expected ‘)’ before ‘.’ token
prog.c:36:13: error: expected expression before ‘)’ token
prog.c:36:13: error: expected ‘)’ before ‘.’ token
prog.c:36:13: error: expected expression before ‘)’ token
prog.c:36:13: error: expected ‘)’ before ‘.’ token
prog.c:36:13: error: expected expression before ‘)’ token
prog.c:36:13: error: expected ‘)’ before ‘.’ token
prog.c:36:13: error: expected expression before ‘)’ token
prog.c:36:13: error: expected expression before ‘libr’
prog.c:54:21: error: break statement not within loop or switch
prog.c:56:13: error: case label not within a switch statement
prog.c:58:21: error: break statement not within loop or switch
prog.c:60:13: error: case label not within a switch statement
prog.c:62:21: error: break statement not within loop or switch
prog.c:64:13: error: case label not within a switch statement
prog.c:66:21: error: break statement not within loop or switch
prog.c:68:13: error: ‘default’ label not within a switch statement
prog.c:17:102: warning: unused variable ‘flag’ [-Wunused-variable]
prog.c:17:96: warning: unused variable ‘v_max’ [-Wunused-variable]
prog.c:17:45: warning: unused variable ‘yyyy’ [-Wunused-variable]
prog.c:17:37: warning: unused variable ‘gg’ [-Wunused-variable]
prog.c:16:60: warning: unused variable ‘isbn_min’ [-Wunused-variable]
prog.c:16:49: warning: unused variable ‘isbn_max’ [-Wunused-variable]
prog.c: At top level:
prog.c:74:12: error: expected declaration specifiers or ‘...’ before string constant
prog.c:74:51: error: unknown type name ‘settembre’
prog.c:75:12: error: expected declaration specifiers or ‘...’ before string constant
prog.c:75:49: error: unknown type name ‘ottobre’
prog.c:76:12: error: expected declaration specifiers or ‘...’ before string constant
prog.c:76:50: error: unknown type name ‘novembre’
prog.c:77:12: error: expected declaration specifiers or ‘...’ before string constant
prog.c:77:50: error: unknown type name ‘dicembre’
prog.c:80:5: error: expected identifier or ‘(’ before ‘for’
prog.c:80:14: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘<’ token
prog.c:80:20: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘++’ token
prog.c:88:1: error: expected identifier or ‘(’ before ‘}’ token
prog.c:89:8: error: expected declaration specifiers or ‘...’ before string constant
prog.c:89:60: error: ‘i’ undeclared here (not in a function)
prog.c:89:62: error: expected ‘;’, ‘,’ or ‘)’ before ‘.’ token
prog.c:90:5: error: expected identifier or ‘(’ before ‘return’
prog.c:91:1: error: expected identifier or ‘(’ before ‘}’ token
prog.c: In function ‘main’:
prog.c:72:4: warning: control reaches end of non-void function [-Wreturn-type]

Standard output is empty