Question
#include<stdio.h>
int main()
{
FILE *fs, *ft;
char c[10];
fs = fopen("source.txt", "r");
c[0] = getc(fs);
fseek(fs, 0, SEEK_END);
fseek(fs, -3L, SEEK_CUR);
fgets(c, 5, fs);
puts(c);
return 0;
}
If the file 'source.txt' contains a line "Be my friend" which of the following will
be the output of below program?
#include<stdio.h>
int main()
{
FILE *fs, *ft;
char c[10];
fs = fopen("source.txt", "r");
c[0] = getc(fs);
fseek(fs, 0, SEEK_END);
fseek(fs, -3L, SEEK_CUR);
fgets(c, 5, fs);
puts(c);
return 0;
}
Answer: Option C
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The file source.txt contains "Be my friend".
fseek(fs, 0, SEEK_END); moves the file pointer to the end of the file.
fseek(fs, -3L, SEEK_CUR); moves the file pointer backward by 3 characters.
fgets(c, 5, fs); read the file from the current position of the file pointer.
Hence, it contains the last 3 characters of "Be my friend".
Therefore, it prints "end".
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