File Operations

Notes on File Operation with C

Function	Description
`fopen()`	opens new or existing file
`fprintf()`	write data into the file ["ফাইল" স্ট্রিম, কি স্ট্রিং ফরম্যাটে সেইভ করব, স্ট্রিম সোর্স]
`fscanf()`	reads data from the file `while(fscanf(fp,"%d",&temp_num)!=EOF){`
`fputc()`	writes a character into the file
`fgetc()`	reads a character (in loop, character by character) from file `while ((c = fgetc(fp)) != EOF) {printf("%c", c);`
`fputs()`	put(WRITE) a whole string to the file
`fgets()`	using while(fgets!=NULL), reads "line by line" from file with whitespace and sets to buffer string `while (fgets(str, 300, f) != NULL) {printf("%s", str);`; `while (fgets(line, sizeof(str_line), f)) {`
`fclose()`	closes the file
`fseek()`	sets the file pointer to given position
`fputw()`	writes an integer to file
`fgetw()`	reads an integer from file
`ftell()`	returns current position
`rewind()`	sets the file pointer to the beginning of the file

scanf("%[^EOF]",str); read full file at once
freopen("fileout.txt", "w", stdout); directly save into the file (steam bypass)
fprintf() e W+ dile full file override hoy, r+ thakle shudhu oi position er char gulo
fscanf(): format %c ar %s er upor depend kore kivabe source theke ek ek kore collect korbe. jodi %s use kori then: ek ekta word by word catch kore, so, _buff (steam) e ekta ekta kore word dhukse, without counting whitespace characters, so, while loop er vitore amake printf() er vitore ekta space ditei hosse Jemon silo temon paite hole fscanf er vitore C ar printf er vitore S.
int temp = 0; while (fscanf(f_input, "%d", &temp) != EOF) {
while (fscanf(ptr, "%c", &str[i]) != EOF && i < 199) { i++;}
while((ptr=strstr(str,word))!=NULL) {memmove(ptr,ptr+len,strlen(ptr+len)+1);}