Thread: Scanf is changing my results!

Could anyone offer any insight here please? I have a complete working program with the parameters for use hard-coded in. This program is 'encapuslated' if you will, within a control loop.

yesterday i added a function call before the main loop starts so that the user can input the run parameters themselves. the function calls are in a switch block and the function body is written after the end of main.

the function uses scanf to read five integer parameters into the program.

I tested their values after the switch block and they are correct as inputted.

However my problem is that now when i allow the program to go on and start its loop the output results are different than if i had left the values hard coded.

I have tested this with known data and the results are well out,

If i comment out the additional function, the results return to normal.

I have heard that scanf is pants?? i am pretty certain the code is ok, so could it be my choice of input reading that is letting the side down.??

As i say, once the program loop starts the values input are static. so i cant figure it out!

I have heard that scanf is pants?? i am pretty certain the code is ok, so could it be my choice of input reading that is letting the side down.??

Yes, I'm certain the standard library, written by experts, reviewed by thousands, and tested by millions, is buggy, and your code must be bug-free.

haha, i consider myself suitably chastised, thanks for the help,i know it was lazy not putting the code in, anyway i noticed that i had saved these files as c++ instead of C, i will change that then ahve a proper look at the rest.

Originally Posted by rogster001

Could anyone offer any insight here please? I have a complete working program with the parameters for use hard-coded in. This program is 'encapuslated' if you will, within a control loop.

yesterday i added a function call before the main loop starts so that the user can input the run parameters themselves. the function calls are in a switch block and the function body is written after the end of main.

the function uses scanf to read five integer parameters into the program.

I tested their values after the switch block and they are correct as inputted.

However my problem is that now when i allow the program to go on and start its loop the output results are different than if i had left the values hard coded.

I have tested this with known data and the results are well out,

If i comment out the additional function, the results return to normal.

I have heard that scanf is pants?? i am pretty certain the code is ok, so could it be my choice of input reading that is letting the side down.??

As i say, once the program loop starts the values input are static. so i cant figure it out!

A code is worth more than a 1000 lines of description about code :-). Thats what i felt after reading through your post.

is too true, but wot with my indentation and commenting being all over the show i was somewhat reluctant to post the code hee