Standard Files C Standard File Device Pointer Standard

Standard Files • �� C �� • �� Standard File Device Pointer ��

�� (Direct input/output) �� fread � �� fwrite � #include <stdio. h> #include <string.

�� (Unformatted input/output) fgetc fgetwc �� wchar_t getc getwc fgets fgetws fputc fputwc ��

�� (Formatted input/output) scanf fscanf sscanf vfscanf vsscanf printf fprintf snprintf vfprintf vsnprint f

�� (Error handling) #include <stdio. h> clearerr �� feof �� ferror �� int main

�� (Operations on files) remove �� renam �� int main (){ e int ret;

�� getchar() • �� • �� #include <stdio. h> • �� getche() �� getch()

�� gets() • �� gets() �� #include <stdio. h> int main() • ��

�� puts() • �� puts() �� #include <stdio. h> #include <string. h> • ��

�� I/O • • Opening Files Closing a File Writing a File Reading a

�� -�� (Opening Files) #include <stdio. h> r - open for reading #include <stdlib.

$�� (Writing a File) FILE *fp; • FILE *fp; fp=fopen("c: \test. bin", "wb"); •$

�� (Reading a File) FILE* fp; char buffer[255]; fp = fopen("file. txt", "r"); while(fgets(buffer,

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Standard Files • �� C �� • �� Standard File Device Pointer �� Standard stdin Keyboard input Standard output stdout Screen Standard error stderr Your screen https: //developer. apple. com/library/content/documentation/Device. Drivers/Conceptual/Writing

�� (Direct input/output) �� fread � �� fwrite � #include <stdio. h> #include <string. h> int main(){ FILE *fp; char c[] = "this is tutorialspoint"; char buffer[100]; /* Open file for both reading and writing */ fp = fopen("file. txt", "w+"); /* Write data to the file */ fwrite(c, strlen(c) + 1, 1, fp); /* Seek to the beginning of the file */ fseek(fp, SEEK_SET, 0); /* Read and display data */ fread(buffer, strlen(c)+1, 1, fp); printf("%sn", buffer); fclose(fp); return(0); }

�� (Unformatted input/output) fgetc fgetwc �� wchar_t getc getwc fgets fgetws fputc fputwc �� byte / wchar_t �� / wchar_t �� / wchar_t �� getchar getwchar �� / wchar_t �� stdin �� gets N/A �� (�� C 99 �� C 11) putchar putwchar �� / wchar_t �� stdout fputs fputws

�� (Formatted input/output) scanf fscanf sscanf vfscanf vsscanf printf fprintf snprintf vfprintf vsnprint f wscanf fwscanf swscanf vfwscanf vswscanf perror �� / wchar_t input �� stdin, �� / wchar_t �� wprintf fwprintf swprintf �� / wchar_t �� stdout, �� vwprintf vfwprintf vswprintf �� / wchar_t �� stdout �� N/A �� stderr

�� (Error handling) #include <stdio. h> clearerr �� feof �� ferror �� int main (){ FILE *fp; int c; fp = fopen("file. txt", "r"); if(fp == NULL) { perror("Error in opening file"); return(-1); } while(1) { c = fgetc(fp); if( feof(fp)) { break ; } printf("%c", c); } fclose(fp); return(0); } https: //fivera. net/hatom-feed-hatom-entry

�� (Operations on files) remove �� renam �� int main (){ e int ret; FILE *fp; �� char filename[] = "file. txt"; fp = fopen(filename, "w"); tmpfile �� fprintf(fp, "%s", "This is tutorialspoint. com"); fclose(fp); ret = remove(filename); tmpna �� if(ret == 0) m �� { #include <stdio. h> #include <string. h> printf("File deleted successfully"); } else { printf("Error: unable to delete the file"); } return(0); }

�� getchar() • �� • �� #include <stdio. h> • �� getche() �� getch() int main (){ �� char c; printf("Enter character: "); c = getchar(); printf("Character entered: "); putchar(c); return(0); } https: //www. tutorialspoint. com/cprogrammi ng/c_input_output. htm

�� gets() • �� gets() �� #include <stdio. h> int main() • �� { char str[50]; printf("Enter a string : "); gets(str); printf("You entered: %s", str); return(0); }

�� puts() • �� puts() �� #include <stdio. h> #include <string. h> • �� int main(){ char str 1[15]; char str 2[15]; strcpy(str 1, "tutorialspoint"); strcpy(str 2, "compileonline"); puts(str 1); puts(str 2); return(0); }

�� I/O • • Opening Files Closing a File Writing a File Reading a File http: //na 5 cent. blogspot. com/2015/01/java-

�� -�� (Opening Files) #include <stdio. h> r - open for reading #include <stdlib. h> w - open for writing (file need not exist) a - open for appending (file need int main(){ not exist) FILE * fp; r+ - open for reading and writing, fp = fopen ("file. txt", "w+"); start at beginning w+ - open for reading and writing fprintf(fp, "%s %s %s %d", "We", (overwrite file) "are", "in", 2560); a+ - open for reading and writing (append if file exists) fclose(fp); return(0); }

$�� (Writing a File) FILE *fp; • FILE *fp; fp=fopen("c: \test. bin", "wb"); •$

�� (Writing a File) FILE *fp; • FILE *fp; fp=fopen("c: \test. bin", "wb"); • fp=fopen("c: \test. txt", "w"); char x[10]="ABCDEFGHIJ"; • fprintf(fp, "Testing. . . n"); fwrite(x, sizeof(x[0]), sizeof(x)/sizeof(x[0]), fp); • int fgetc (FILE *fp); • int fputc( int c, FILE *fp ); http: //www. cprogramming. com/

�� (Reading a File) FILE* fp; char buffer[255]; fp = fopen("file. txt", "r"); while(fgets(buffer, 255, (FILE*) fp)) { printf("%sn", buffer); } fclose(fp);