C file input/output: Difference between revisions

Revision as of 21:17, 10 September 2021

Revision as of 16:32, 30 December 2021

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The [[POSIX]] standard defines several extensions to {{mono|stdio}} in its Base Definitions, among which are a {{mono|readline}} function that allocates memory, the {{mono|fileno}} and {{mono|fdopen}} functions that establish the link between {{mono|FILE}} objects and [[file descriptor]]s, and a group of functions for creating {{mono|FILE}} objects that refer to in-memory buffers.<ref>{{man|bd|stdio.h|SUS}}</ref>

Write a c program to display the following 12 series by using for loops:

==Example==

i)1 2 3 4 }5

The following C program opens a binary file called ''myfile'', reads five bytes from it, and then closes the file.

ii)10 11 12 13 ....20

iii)21 22 23 24 ...30

<syntaxhighlight lang="c">

iv)31 32 33 34....50

v)1 2 3 4.....99 100

vi)2 4 6 8 10

vii)10 12 14 16.....60

viii)1 3 5 7....59

ix)51 53 55.....99

x)2 4 6 8.....96 98

xi) A B C D...Z

xii)a b c d....z

******************************************/

#include <stdio.h>

#include <stdlib.h>

int main(void)
{

charint buffer[5]i;

FILE* fp = fopenprintf("myfile",Series "rb1:\n--------\n");

for(i=1;i<=5;i++){

if printf(fp == NULL"%d\t",i) {;

perror("Failed to open file \"myfile\"");

return EXIT_FAILURE;

}

printf("\n\nSeries 2:\n--------\n");

for (int i = 010; i < 5=20; i++) {

int rc = getcprintf(fp"%d\t",i);

}

if (rc == EOF) {

printf("\n\nSeries 3:\n--------\n");

fputs("An error occurred while reading the file.\n", stderr);

for(i=21;i<=30;i++){

return EXIT_FAILURE;

printf("%d\t",i);

}

}

printf("\n\nSeries 4:\n--------\n");

buffer[i] = rc;

for(i=31;i<=50;i++){

printf("%d\t",i);

}

printf("\n\nSeries 5:\n--------\n");

for(i=1;i<=100;i++){

printf("%d\t",i);

}

printf("\n\nSeries 6:\n--------\n");

for(i=2;i<=10;i=i+2){

printf("%d\t",i);

}

printf("\n\nSeries 7:\n--------\n");

for(i=10;i<=60;i=i+2){

printf("%d\t",i);

}

printf("\n\nSeries 8:\n--------\n");

for(i=1;i<=59;i=i+2){

printf("%d\t",i);

}

printf("\n\nSeries 9:\n--------\n");

for(i=51;i<=99;i=i+2){

printf("%d\t",i);

}

printf("\n\nSeries 10:\n--------\n");

for(i=2;i<=98;i=i+2){

printf("%d\t",i);

}

printf("\n\nSeries 11:\n--------\n");

char j;

for(j='A';j<='Z';j++){

printf("%c\t",j);

}

printf("\n\nSeries 12:\n--------\n");

char k;

for(k='a';k<='z';k++){

printf("%c\t",k);

}

fclose(fp)return 0;

printf("The bytes read were... %x %x %x %x %x\n", buffer[0], buffer[1],

buffer[2], buffer[3], buffer[4]);

return EXIT_SUCCESS;

}

</syntaxhighlight>

==Alternatives to stdio{{anchor|Sfio}}==