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Data (cont)

Ways to input data into a program:
  • stdin 

    prompt$ ./floats
Enter a number: 3.141593
Enter a number: 2.718282
The greater number is 3.141593

    • read data using scanf() or getchar() or fgets(...,stdin) etc.
    • can be redirected from files by < (on command line): 

      prompt$ more xy.txt
3.141593
2.718282
prompt$ ./floats < xy.txt
Enter a number:
Enter a number:
The greater number is 3.141593

  • Files (Week 10)