我无法弄清楚为什么我的 c 程序中的这个 fclose() 会导致访问错误。它工作正常，然后我将 if 条件更改为仅在字符串不相等时才打印，突然它开始引起问题。除了错误的访问错误之外，它也没有向“newfile.txt”打印任何内容
#include<stdio.h>
#include<stdlib.h>
#include <string.h>
int main()
{
FILE * cFile;
FILE *outputfile;
FILE *newfile;
cFile = fopen("input.in", "r");
if (cFile == NULL){
printf("bad input file");
}
newfile = fopen("newfile.txt", "w+");
if (newfile == NULL){
printf("bad newfile");
}
char tempstring[15];
char tempstring2[15];
//get each line in the cFile
while (fscanf(cFile, "%15s", tempstring) != EOF) {
outputfile = fopen("outputlotnum.txt", "r"); //open/(or reopen) outputfile to check lines
if (outputfile == NULL){
printf("bad outputfile");
}
//get each line in the outputfile
while(fscanf(outputfile, "%15s", tempstring2) != EOF){
//if the line from cFile doesn't match the line from outputfile,
//then go ahead and print the line to the newfile.txt
if (strcmp(tempstring, tempstring2) != 0){
fprintf(newfile,"%15s \n", tempstring2);
}
//else don't print anything and continue on to the next line
}
fclose(outputfile); //close the outputfile after checking all the lines for a match
}
fclose(newfile); //throws bad access
fclose(cFile);
return 0;
}