#include <stdio.h>
FILE * fopen(const char * path, const char * mode);
#include<stdio.h>
#include<string.h>
#include<stdlib.h>
int main()
{
FILE* fstream;
char msg[100] = "Hello!I have read this file.";
fstream=fopen("test.txt","at+");
if(fstream==NULL)
{
printf("open file test.txt failed!\n");
exit(1);
}
else
{
printf("open file test.txt succeed!\n");
}
fclose(fstream);
return 0;
}
#include <stdio.h>
FILE * fdopen(int fildes, const char * mode);
#include <stdio.h>
main()
{
FILE * fp = fdopen(0, "w+");
fprintf(fp, "%s\n", "hello!");
fclose(fp);
}
hello!
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