getchar () vs scanf

[jdeejay]

I have two sets of prompts. The user picks from 3 choices in the first prompt, the code executes and then prompt number two appears. Now when I read in the second prompt (the first time) it is invalid. when I read a second time, it is valid. Then it alternates back and forth--invalid then valid. What is the best way to read these two prompts without holding onto any newlines or CR's. I have every combination of scanf and getchar that I can think of and also using fflush(NULL); in between. All with less than desirable results.

What should I be using?

Thanks in advance,
J

 

[bigtamscot]

try fflush(stdin);........you dont say what the prompts ask for int or char value. there are a number of different ways to read charcters, some of which are compiler and os dependant. have a look at fgetc(stdin); Hoping to get certified..in C programming.

 

[smaniraja]

I think you are reading the choice as a single character. If so, read the single character using scanf() with %s options. See the folloing code.

char c;
scanf("%1s", &c);

This will read a single character perfectly without any \n and \r problems.

Regards,
Maniraja S