Thread: C database problem

ok so I have a few problems with my code, first off the program i am trying to make uses a database, the user inputs a date and my program will turn it into a code that it will store in a txt file and the program will read it every night at mid night and if it has a code correspondes with the date it will show on the screen how many there are. but my problem right now is that i cant change the date to code.

this is what i was trying to do but it crashes. this test does not include the whole date i was only testing with february, (at one point i think i try to change a char variable into an int variable, i dont no if this is legal or not so feel free to comment about it.) i have included an attachment if you wish to run it in your compiler.



#include <conio.h>
#include <stdio.h>
int main(int arge, char *argv[])
{
FILE *pfile;
int month;
char sced[21];
float date[32];
char answer = 'y';
char num1;
char february;
pfile = fopen("database2.txt", "w");

if (pfile != NULL)
{



while (answer == 'y')
{
printf("write the month: ");
if (month == february);
{
february = 01;
}
scanf("%s", &month);
printf("what is happening:");
scanf("%s", &sced);
printf("loading");
fprintf(pfile,"%s", &sced); /* crashes here*/
fprintf(pfile,"%s\n", &month);
printf("do you wish to put in any more dates [y/n] \n");
answer = getch();
}

fclose(pfile);
}

else
{
printf("could not open the file.\n");

}
getch();
}

Code:

scanf("%s", &month);

month is not a string, so why are you using a %s here?

Code:

scanf("%s", &sced);

sced IS a character array, and by definition the name of the array the address of the first element in the array, so you do not need to have a & in there

Code:

fprintf(pfile,"%s", &sced); /* crashes here*/

You are printing the address as if it where a string...lose the & again

Code:

fprintf(pfile,"%s\n", &month);

Again, month is not a string, so why the %s? And also again, why print the address rather than the value?

Those are the things that jump out at me.

I took your advice and it doesn't crash any more , but when I open the program this is what is does :
write the month: february <---(i write the month, press enter then it just skips to the end of the loop)
what is happening:loadingdo you wish to put in any more dates [y/n] <-----(like this)

i have included the file if you would like to see for yourself, and the code:

Code:

#include <conio.h>
#include <stdio.h>
int main(int arge, char *argv[])
{
FILE *pfile;
int month;
char sced[21];
float date[32];
char answer = 'y';
char num1;
char february; 
pfile = fopen("database2.txt", "w");

if (pfile != NULL)
{



while (answer == 'y')
{
printf("write the month: ");
if (month == february);
{
february = 01;
}
scanf("%d", &month);
printf("what is happening:");
scanf("%d", sced);
printf("loading");
fprintf(pfile,"%s", sced); 
fprintf(pfile,"%d\n", month);
printf("do you wish to put in any more dates [y/n] \n");
answer = getch();
}

fclose(pfile);
}

else
{
printf("could not open the file.\n");

}
getch();
}