函数主体中不允许使用文件指针和结构变量声明 [英] file pointer and structure variable declaration not allowed in function main body

问题描述

在这里我正在c学校管理申请。

bt我已经达到了一个真正贬低我的点

它给了我一个错误，如声明不允许这里同时使用文件指针和结构变量声明...



i不能理解这个错误让我烦恼..

here i m making an application on school mgmt in c .
bt i have reached a point that really herrasing me
it gives me a error like declaration not allowed here while using file pointer and structure variable declaration ...

i cant understand this error is annoying me..

void addrecord( )

{

                system("cls");

                FILE *fp ;// here error ocured

                char another = 'Y' ,time[10];

                struct record e ;// error

                char filename[15];

                int choice;

                printf("\n\n\t\t***************************\n");

                printf("\t\t* WELCOME TO THE ADD MENU *");

                printf("\n\t\t***************************\n\n");

                printf("\n\n\tENTER DATE OF YOUR RECORD:[yyyy-mm-dd]:");

                fflush(stdin);

                gets(filename);

                fp = fopen (filename, "ab+" ) ;

                if ( fp == NULL )

                {

                fp=fopen(filename,"wb+");

                if(fp==NULL)

                {

                    printf("\nSYSTEM ERROR...");

                    printf("\nPRESS ANY KEY TO EXIT");

                    getch();

                    return ;

                }

                }

                while ( another == 'Y'|| another=='y' )

                {

                    choice=0;

                    fflush(stdin);

                printf ( "\n\tENTER TIME:[hh:mm]:");

                scanf("%s",time);

                rewind(fp);

                while(fread(&e,sizeof(e),1,fp)==1)

                {

                    if(strcmp(e.time,time)==0)

                    {

                        printf("\n\tTHE RECORD ALREADY EXISTS.\n");

                        choice=1;

                    }

                }

                    if(choice==0)

                    {

                        strcpy(e.time,time);

                        printf("\tENTER NAME:");

                        fflush(stdin);

                        gets(e.name);

                        fflush(stdin);

                        printf("\tENTER PLACE:");

                        gets(e.place);

                        fflush(stdin);

                        printf("\tENTER DURATION:");

                        gets(e.duration);

                        fflush(stdin);

                        printf("\tNOTE:");

                        gets(e.note);

                        fwrite ( &e, sizeof ( e ), 1, fp ) ;

                        printf("\nYOUR RECORD IS ADDED...\n");

                    }

                        printf ( "\n\tADD ANOTHER RECORD...(Y/N) " ) ;

                        fflush ( stdin ) ;

                        another = getchar( ) ;

                }

                fclose ( fp ) ;

                printf("\n\n\tPRESS ANY KEY TO EXIT...");

                getch();

    }

推荐答案

system("cls"); // <<======= MOVE THIS LINE

FILE *fp ;// here error ocured

char another = 'Y' ,time[10];

struct record e ;// error

char filename[15];

int choice;

// <<======= HERE

正如 nv3 所述， C 编程语言要求变量声明在块的最开头（实际上， C99 兼容编译器不应该要求）。

As already noted by nv3, the C programming language requires variable declarations be at the very beginning of the block (well, actually C99 compliant compilers should not require that).

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