fgets() does not work as I expect it to

Question

Can anyone tell me why this code does not work? When i run, it just prints out \"Enter info about trail 1\" and without any input, skips to another step.

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Answer 1

Issue

The scanf function in main reads the integer, but leaves the newline \n on the input stream. When the first loop iteration of readingArrays comes around, fgets sees this newline and assumes you have already entered your trail info and pressed enter. It prints the empty string and newline, and goes on to the next iteration.

Solution

One solution would be to tell scanf to read and ignore whitespace after the digit by adding a space after %d format specifier.

So to get numberOfTrails from stdin, you would do

scanf("%d ",&numberOfTrails);

Thanks to @Ray for pointing out this solution!