如何使用FILE * FP调用函数来关闭文件

Question

In main I create a file pointer, pass that to a function to open it and I want to have a separate function to close the file but I am not able to close the file. What am I missing?

I do not get an error but the way that I am checking indicates the files did not close.

thanks for help on this.

 int _tmain(int argc, _TCHAR* argv[])
{
    FILE *inFile, *outFile;
    FileOpen(&inFile, &outFile);
    FileClose(&inFile, &outFile);

    getch();
    return 0;
}

void FileOpen(FILE **inFile, FILE **outFile)
{
//--Open InFile--------------------------------
    if ((*inFile = fopen("a.txt","r")) == NULL){
        printf("\nError Opening File. ");
        exit(0);
    }
    else {
        printf("File Opened\n");
         }

//--Open OutFile--------------------------------
    if ((*outFile = fopen("b.txt","w")) == NULL){
        printf("\nError Opening File. ");
        exit(0);
    }
    else {
        printf("File Opened\n");
         }
}


void FileClose(FILE **inFile, FILE **outFile)
{
//--Close InFile----------
    if (fclose(*inFile)){
        printf("File Closed\n");
    }
    else {
         printf("\nError Closing InFile File. ");
    }

//--Close outFile---------
    if (fclose(*outFile)){
        printf("File Closed\n");

    }
    else {
         printf("\nError Closing OutFile File. ");
    }
 }

Answer 1

您误解了返回值 ： fclose 成功返回0，因此您需要检查if (fclose(*inFile) == 0) 。