dasc.c

/*
 * count the number of each digit, whitespace,
 * and all other chars
 *
 * Matt Bishop, ECS 36A
 * April 12, 2024	original version
 */
#include <stdio.h>

int main(void)
{
	register int c;					/* input char */
	register int nwhite = 0;		/* whitespace count */
	register int nother = 0;		/* other count */
	register int i;					/* counter in a for loop */
	int ndigit[10];					/* digit counts */
	/*
	 * initialize the ndigit array
	 */
	for(i = 0; i < 10; i++)
		ndigit[i] = 0;
	/*
	 * handle input a char at a time
	 */
	while((c = getchar()) != EOF){
		/* see what it is */
		if (c >= '0' && c <= '9'){
			/* it's a digit -- bump the right count */
			ndigit[c - '0']++;
		}
		else if (c == ' ' || c == '\t' || c == '\n'){
			/* it's whitespace */
			nwhite++;
		}
		else{
			/* it's neither a digit nor whitespace */
			nother++;
		}
	}
	/*
	 * announce the results and quit
	 */
	printf("digits: ");
	for(i = 0; i < 10; i++){
		printf("'%c' %3d\t", i + '0', ndigit[i]);
		/* put 5 digits per line, for neat output */
		if (i == 4)
			printf("\n        ");
	}
	putchar('\n');
	printf("whitespace: %d\nother:      %d\n", nwhite, nother);
	exit(0);
}

Matt Bishop Office: 2209 Watershed Sciences Phone: +1 (530) 752-8060 Email: mabishop@ucdavis.edu

ECS 36A, Programming & Problem Solving Version of April 2, 2024 at 12:13PM

You can get the raw source code here.