escribir en el archivo en c
#include<stdio.h>
int main(){
FILE *out=fopen("name_of_file.txt","w");
fputs("Hello File",out);
fclose(out);
return 0;
}
JJSE
#include<stdio.h>
int main(){
FILE *out=fopen("name_of_file.txt","w");
fputs("Hello File",out);
fclose(out);
return 0;
}#include <stdbool.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
/*
* Functions Signatures
* */
size_t my_strlen(const char * str);
void my_strcat(char * dest, const char * src);
bool start_with( char* s, char* prefix);
unsigned int num_words(const char * str);
char * get_chapter_file_name(const char* prefix, const char* s, const char* suffix );
int main(int argc, const char * argv[]) {
unsigned int total_lines = 0, total_words = 0, total_chars = 0;
char *buf = NULL;
size_t buff_size = 0;
FILE *f_in = fopen(argv[1] , "r");
FILE *file_name = NULL;
char * chapter = get_chapter_file_name("Moby-","PREFACE\n", ".txt" );
file_name = fopen(chapter, "w");
if(argc != 2) {
fprintf(stderr, "\nUsage: %s <file-path>\n", argv[0]);
return 1;
}
if ( ( !f_in ) || (!file_name) ) {
printf((const char *) stderr, "Filed to open %s", f_in);
exit(-1);
}
unsigned int n_words=0, num_chars=0, num_lines=0;
while( getline( &buf, &buff_size, f_in ) != EOF) {
if (start_with(buf, "CHAPTER")) {
fclose(file_name);
total_lines += num_lines;
total_chars += num_chars;
total_words += n_words;
printf("%-30s : %d lines, %d words, %d characters\n", chapter, num_lines, n_words, num_chars);
free(chapter);
num_lines = 0;
num_chars = 0;
n_words = 0;
chapter = get_chapter_file_name("Moby-", buf, ".txt");
file_name = fopen(chapter, "w");
if (!file_name) {
exit(-1);
}
}
fprintf(file_name,"%s", buf);
num_chars += my_strlen(buf);
n_words += num_words(buf);
num_lines++;
}
printf("TOTAL : %d lines, %d words, %d characters\n", total_lines, total_words, total_chars);
free(buf);
fclose(f_in);
fclose(file_name);
return 0;
}
/* Find the length of a string */
size_t my_strlen(const char *str) {
int i = 0;
while (*str) {
i++;
str++;
}
return i;
}
/* I did not need this function
* However I defined it that way */
void my_strcat(char *dest, const char *src) {
unsigned int len_of_des = my_strlen(dest);
unsigned int len_of_src = my_strlen(src);
while (*dest) {
++dest;
}
while (*src) {
*dest = *src;
src++;
dest++;
}
unsigned int go_back = (len_of_des + len_of_src);
while( go_back != 0 ) go_back--, dest--;
}
/* This function will Catch * char buffer
* That is coming from the mobybock.txt
* Will return true if the buffer contains the prefix -> Chapter */
bool start_with(char *s, char *prefix) {
char *s_ptr = NULL;
char *prefix_ptr = NULL;
for (s_ptr = s, prefix_ptr = prefix; *prefix_ptr; s_ptr++, prefix_ptr++) {
if ( (*s_ptr) != (*prefix_ptr) )
return false;
}
return true;
}
/* Counts number of words inside a string */
unsigned int num_words(const char *str) {
if (str == NULL)
return 0;
bool is_one_space = true;
int words = 0;
while (*str != '\0') {
if ((*str == ' ') && is_one_space) {
is_one_space = false;
++words;
++str;
} else if ((*str != '\n') && (*str != '\t')) {
is_one_space = true;
++str;
} else {
++str;
}
}
return words;
}
/* Will return each chapter as a txt file name */
char *get_chapter_file_name(const char *prefix, const char *s, const char *suffix) {
unsigned int len_s = my_strlen(s);
unsigned int len_prefix = my_strlen(prefix);
unsigned int len_suffix = my_strlen(suffix);
size_t size = len_prefix + len_s + len_suffix;
char *arr = malloc( sizeof(char) * (size+1) );
*arr='\0';
unsigned int count_prefix = 0;
my_strcat(arr,prefix);
arr[len_prefix+1] = '\0';
/* Adding "-" for white spaces */
char * end_of_s = s;
end_of_s += len_s - 1;
unsigned int i= len_prefix;
for (; *s && (s != end_of_s-1) ; count_prefix++, s++) {
if ( (*s == ' ') ) {
// Add '-' if there is a space
arr[i++] = '-';
} else {
arr[i++] = *s ;
// Else add the char;
}
}arr[i]= '\0';
my_strcat(arr,suffix);
arr[i + len_suffix] = '\0';
return arr;
}