Help writing to file

[HAssan]

Hello I wrote this program it's meant to take the final value of the soconday voltage or the secondary current and send the final value to a file saved in the the c: drive called test. The program excutes well but when i go back to see if the values are in the file it's not there. I was hoping Someone could fix my code and point out the mistakes. I would be highly obliged is someone takes 5 mins of thir time to do so.

#include <stdio.h>

int main()
{
	float voltageP,voltageS,currentP,currentS,N1,N2,i;
	FILE *inp, *outp;
	
printf(" If you want to calculate in terms of voltage enter 1 for current enter any other number: ");
scanf("%f",&i);

if (i==1) {
	printf("What is the primary voltage: ");
	scanf("%f",&voltageP);
	printf("How many turns in the primary coil: ");
	scanf("%f",&N1);
	printf("How many turns in the secondary coil: ");
	scanf("%f",&N2);
	voltageS=voltageP*N2/N1;
	printf("The secondary voltage is equal to %f volts\n",voltageS);
	inp =fopen("c:test.txt", "w");
}

else {
	printf("What is the primary current: ");
	scanf("%f",&currentP);
	printf("How many turns in the primary coil: ");
	scanf("%f",&N1);
	printf("How many turns in the secondary coil: ");
	scanf("%f",&N2);
	currentS=currentP*N2/N1;
	printf("The secondary current is equal to %f amps\n",currentS);
	inp =fopen("c:test.txt", "w");
}
return 0;
}

[cbastard]

Always check the file pointers to NULL.
I guess you are waiting for almighty to write the values to the file .because I cant see any code you have written to write the values to files.Do some search on board on how to write on files incase you dont know.

[BobS0327]

In your code, you have to properly open the file. Please pay attention to the double backslashes in the fopen statement. Also, you have to write data to the file using fprintf etc. And finally you have to close the file.

Bob

	inp =fopen("c:\\test.txt", "w");
	 fprintf( inp, "%f %f %f %f\n", voltageP, voltageS, N1, N2 );
	 fclose(inp);

[dwks]

And finally you have to close the file.

Well, you don't have to. But it's a good idea to do so.