I need to compare the first and the last letter in a word; if these letters are the same, I need to output that word to a file. But I take words from another file. My problem is i can't guess how i should output all words because in my code, it outputs only the first word. So i understand that i have no transition to others.
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include<malloc.h>
#include <string.h>
int main()
{
char my_string[256];
char* ptr;
FILE *f;
if ((f = fopen("test.txt", "r"))==NULL) {
printf("Cannot open test file.\n");
exit(1);
}
FILE *out;
if((out=fopen("result.txt","w"))==NULL){
printf("ERROR\n");
exit(1);
}
fgets (my_string,256,f);
int i;
int count = 1;
printf("My string is %d symbols\n", strlen(my_string));
for (ptr = strtok(my_string," "); ptr != NULL; ptr= strtok(NULL," "))
{
int last = strlen(ptr) - 1;
if ((last != -1) && (ptr[0] == ptr[last]))
{
printf("%s\n",ptr);
}
}
printf("\n%s\n",my_string);
fprintf(out,"%s\n",my_string);
system("pause");
fclose(f);
fclose(out);
return 0;
}
In my first file there are words:
high day aya aya eye that
From my words from the first file, it outputs only the first word
high
to the second file. I expect the following:
high aya aya eye
You're not outputting anything to the file except at the very end when you fprintf the entire string:
fprintf(out,"%s\n",my_string);
You need to change printf("%s\n",ptr);
to fprintf(out,"%s\n",ptr);
in that for loop. Otherwise it will just output everything to the console.