49 lines
1.1 KiB
C
49 lines
1.1 KiB
C
#include <stdio.h>
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/*
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this program reads in a data file consisting of
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multiple lines, each line contains a floating
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point number and a single character label.
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This simulates multiple accounts with charges
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and credits. The program will add up all charges
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and credits and print a total for each.
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*/
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main ()
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{
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float value, add[255];
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char label[1024];
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int i;
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FILE *stream;
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/* initialize the array to zero */
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for (i = 0; i < 255; i++)
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add[i] = 0;
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/* open the input file for reading, quit if it doesn't open */
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if ((stream = fopen ("example3.dat", "r")) == (FILE *) 0)
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{
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fprintf (stderr, "Couldn't open example3.dat file.");
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return 1;
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} /* end if */
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/* read from the file until you reach the end of the file */
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while (fscanf (stream, "%e%s", &value, label) != EOF)
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{
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add[*label] = add[*label] + value;
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} /* end while */
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/* print out the totals for the files by label */
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for (i = 0; i < 255; i++)
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{
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if (add[i] != 0)
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printf ("%c %6.2f\n", i, add[i]);
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}
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/* we are done and successful */
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return 0;
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} /* end main */
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