// Analyzing a student poll.
#include <stdio.h>
#define RESPONSES_SIZE 40 // define array sizes
#define FREQUENCY_SIZE 11
// function main begins program execution
int main( void )
{
size_t answer; // counter to loop through 40 responses
size_t rating; // counter to loop through frequencies 1-10
// initialize frequency counters to 0
int frequency[ FREQUENCY_SIZE ] = { 0 };
// place the survey responses in the responses array
int responses[ RESPONSES_SIZE ] = { 1, 2, 6, 4, 8, 5, 9, 7, 8, 10,
1, 6, 3, 8, 6, 10, 3, 8, 2, 7, 6, 5, 7, 6, 8, 6, 7, 5, 6, 6,
5, 6, 7, 5, 6, 4, 8, 6, 8, 10 };
// for each answer, select value of an element of array responses
// and use that value as subscript in array frequency to
// determine element to increment
for ( answer = 0; answer < RESPONSES_SIZE; ++answer ) {
++frequency[ responses [ answer ] ];
} // end for
// display results
printf( "%s%17s\n", "Rating", "Frequency" );
// output the frequencies in a tabular format
for ( rating = 1; rating < FREQUENCY_SIZE; ++rating ) {
printf( "%6d%17d\n", rating, frequency[ rating ] );
} // end for
} // end main
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