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#include <stdio.h>
/* The C Programming Language: 2nd Edition
*
* Exercise 1-15: Rewrite the temperature conversion program of Section 1.2 to
* use a function for conversion.
*
* Answer: This exercise teaches you the purpose of functions: to perform
* specific operations that can be reused. Writing good functions is the
* foundation of good programming. Without functions, programming would still
* be in its version of the stone age.
*
* In the case of temperature conversion, all you really need to do is
* outsource the math to a function and return the result.
*/
#define MAX_F 300.0
#define STEP 20.0
float convert_to_c(float f) {
float celsius = (5.0 / 9.0) * (f - 32.0);
return celsius;
}
int main() {
printf("FAHRENHEIT CELSIUS\n");
float i;
for (i = 0.0; i <= MAX_F; i += STEP) {
printf("%4.0f %7.3f\n", i, convert_to_c(i));
}
return 0;
}
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