C reads data from TXT and asks for help

It is read out as bytes and is converted to a number.

#include

#include

int main()

char *pchbuf = null;

int nlen = 0;

int num;

file *pf = fopen("e:\\", "r");Open the file.

fseek(pf, 0, seek_end);The file pointer is moved to the end of the file.

nlen = ftell(pf);Get the current pointer position, which is the length of the file.

rewind(pf);The file pointer is restored to the file header position.

Dynamically request space, in order to save the string ending flag 0, request one more character space.

pchbuf = (char*) malloc(sizeof(char)*nlen+1);

if(!pchbuf)

perror("Not enough memory! ");

exit(0);

Reading the content of the file There may be discrepancies between the length of the read file and the length of the source file, so the nlen is automatically adjusted here

nlen = fread(pchbuf, sizeof(char), nlen, pf);

pchbuf[nlen] = '\0';Add a string ending flag.

printf("%s", pchbuf);Output the read content to the screen.

nlen = 0;

while(pchbuf[nlen] != '\0')

num = 0;

printf("lijinlindi1");

num = num * 10 + pchbuf[nlen] -'0');

nlen++;

printf("result = %d",num);

if(pchbuf[nlen] == '\0')

break;

nlen++;

fclose(pf);Close the file.

free(pchbuf);Free up space.

return 0;

Dude, I'm sad to read data from a file, you need to use the file read function, why don't you forget that.

created: 2008/09/30

created: 30:9:2008 23:29

author: wangtk1982

#include

#define year 365

#define year4 (year*4+1)

#define year100 (year4*25-1)

#define year400 (year100*4+1)

long datefunc(int,int,int);

int main(void)

printf("Interval %ld days", datefunc(2008,10,1)- datefunc(1988,7,23));

The days used to count the first year of the Common Era*

long datefunc(int year,int month,int date)

int leapyear[2][12] = {

long days=0;Define the length of time

Leap year symbol*

year;*There is no 0 year A.D.*

The cumulative number of days* for a year is calculated below

days+=(year/400)*year400;year%=400;

days+=(year/100)*year100;year%=100;

days+=(year/4)*year4;year%=4;

days+=year*year;

The cumulative number of days in the month is calculated below*

for (int i=0;idays+=leapyear[bleap?1:0][i];

The cumulative number of days* for the days is calculated below

days+=date;

return days;*Back*