The following question assume the file test contains comma-delimited digits on s

Question

The following question assume the file test contains comma-delimited digits on separate
lines as follows:
4,7,1,2,7
1,8,3
1,2,8,3,4,7,9,4,1,0
Thus each line contains a list of single digits separated by comma.
Write a program that validates a sequence of digits in the CSV format (given above) i.e. each
line of the input text of the program contains comma-separated list of digits. The output value
1 indicates that the input text file is valid and the output value 0 indicates that the input text
file is invalid. You must use C programming language and the corresponding source code
must be in the file p1.c.
For example:
$p1 < test
1

Explanation / Answer

#include #include int main() { int c; while ((c = getchar()) != EOF ) { switch(c) { case'0': printf("1"); break; case'1': printf("1"); break; case'2': printf("1"); break; case'3': printf("1"); break; case'4': printf("1"); break; case'5': printf("1"); break; case'6': printf("1"); break; case'7': printf("1"); break; case'8': printf("1"); break; case'9': printf("1"); break; case',' : printf("1"); break; case' ' : printf("1"); break; default : printf("0"); break; } }

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