c write to file

1#include<stdio.h>
2int main(){
3	FILE *out=fopen("name_of_file.txt","w");
4	fputs("Hello File",out);
5	fclose(out);
6	return 0;
7}

1#include <stdio.h>
2#include <stdlib.h>
3
4int main() {
5    char sentence[1000];
6
7    // creating file pointer to work with files
8    FILE *fptr;
9
10    // opening file in writing mode
11    fptr = fopen("program.txt", "w");
12
13    // exiting program 
14    if (fptr == NULL) {
15        printf("Error!");
16        exit(1);
17    }
18    printf("Enter a sentence:\n");
19    fgets(sentence, sizeof(sentence), stdin);
20    fprintf(fptr, "%s", sentence);
21    fclose(fptr);
22    return 0;
23}
24

1/*Program to read from file using getc() function*/
2#include <stdio.h>
3int main() {
4 FILE *fp;
5 char ch;
6 /*Open file in read mode*/
7 fp= fopen ('example.txt', 'r');
8 while( (ch = getc(fp)) != EOF) {
9  /*getc() function reads a character and its value is stored in variable 'ch' until EOF is encountered*/
10  printf('%ch', ch);
11 }
12  fclose(fp);
13  return 0;
14}

1  [...]
2  printf("Enter name: \n");
3  if (fgets(name, sizeof name, stdin)) {
4    fputs(name,fileptr);
5    fclose(fileptr);
6    printf("File write was successful\n");
7  } else {
8    printf("Read error.\n");
9  }
10