C problem with typing

Question

Input to y2 skipped during operation. Why?

 #include <stdio.h> #include <stdlib.h> int main (void) { char buffer [5] = {0}; char y1 = 0, y2 = 0, y3 = 0; printf("Will you use characters (y/n) ?"); y1 = getchar(); printf("Will you use big characters (y/n) ?"); y2 = getchar(); printf("Will you use numbers (y/n) ?"); y3 = getchar(); printf("Enter your password ?"); scanf("%4s", buffer); printf("%c\r\n", y1); printf("%c\r\n", y2); printf("%c\r\n", y3); printf("%s\r\n", buffer); printf("done."); return EXIT_SUCCESS; }

Harry Harry 106k 9 54 132 · Accepted Answer · 2017-01-06T19:25:54

It reads the key press <Enter> .

 #include <stdio.h> #include <stdlib.h> int main (void) { char buffer [5] = {0}; char y1 = 0, y2 = 0, y3 = 0; printf("Will you use characters (y/n) ?"); y1 = getchar(); while(getchar() != '\n'); printf("Will you use big characters (y/n) ?"); y2 = getchar(); while(getchar() != '\n'); printf("Will you use numbers (y/n) ?"); y3 = getchar(); while(getchar() != '\n'); printf("Enter your password ?"); scanf("%4s", buffer); printf("%c\r\n", y1); printf("%c\r\n", y2); printf("%c\r\n", y3); printf("%s\r\n", buffer); printf("done."); return EXIT_SUCCESS; }

And I also brought the solution - see the source ... My version, by the way, allows input of the type yes , no :) - will take only the first character.

Answer 2 · 2017-01-06T19:27:52

The getchar function reads all characters from the stream, including spaces, newlines, etc.

Instead of this function, use the scanf function. For example,

 scanf( " %c", &y1 ); ^^^^

Pay attention to the space before the % character. It serves to skip the characters of the spaces in the input stream.

Also, when displaying to the console, there is no need to use the carriage return symbol. Enough to write

 printf("%c\n", y1); ^^^^

C problem with typing

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