funct.c

C源码集

#include <stdio.h>

/* prototype bit - must have!! Tells the compiler how print_table works*/
int print_table(double, double, double);

int main (void)
{
	int how_many;
	double end = 50.0;

	how_many = print_table(1.0, end, 3);
	/* how_many becomes value lines had in function */
	printf("number of lines: %i\n", how_many);
   printf("/nPress <Enter> to continue/n");
	getchar();   // makes program wait for a keypress

	print_table(end, 200, 15);
	/* don't need to use the returned value */

	return 0;
}

int print_table(double start, double end, double step)
{
	double d;
	int lines = 1;

	printf("Celcius\tFarenheight\n");

	for (d = start; d<= end; d += step, lines++)
		printf("%.1lf\t%.1lf\n", d, d * 1.8 + 32);

	return lines;
}