count_chars.c Code :

#include

/* counts characters, vowels, consonants, and punctuation given in str - vow, cons, and punct are reference parameters */ int count_em(char *str, int *vow, int *cons, int *punct) { int i = 0; int numChars = 0; char *p; *vow = 0; *cons = 0; *punct = 0;

for(p = str; *p != '\0'; p++) { /* lab exercise -- finish loop body to increment * appropriate counters */ // add one to numChars

switch(*p) { case 'a': case 'e': case 'i': case 'o': case 'u': case 'A': case 'E': case 'I': case 'O': case 'U': // add one to vowels

break; case 'b': case 'c': case 'd': case 'f': case 'g': case 'h': case 'j': case 'k': case 'l': case 'm': case 'n': case 'p': case 'q': case 'r': case 's': case 't': case 'v': case 'w': case 'x': case 'y': case 'z': case 'B': case 'C': case 'D': case 'F': case 'G': case 'H': case 'J': case 'K': case 'L': case 'M': case 'N': case 'P': case 'Q': case 'R': case 'S': case 'T': case 'V': case 'W': case 'X': case 'Y': case 'Z': // add one to consonants

break; case '.': case ',': case ':': case ';': case '!': case '?': case '(': case ')': // add one to punctuation

break; } } return numChars; }

/* reads file from stdin */ /* usage: a.out

/* this program only works for files whose lines are all shorter than 2000 characters */ char buffer[2000];

int total = 0; int vowels = 0; int consonants = 0; int punc = 0;

/* read data from stdin */ for (;;) { int count = scanf("%1999[^ ]", buffer); /*read up to 1999 chars*/ if (feof(stdin)) break; if (count != 0) { int vowels1, consonants1, punc1; total += count_em(buffer, &vowels1, &consonants1, &punc1); vowels += vowels1; consonants += consonants1; punc += punc1; } getc(stdin); /* read newline */ }

printf("characters: %d ", total); printf("vowels: %d ", vowels); printf("consonants: %d ", consonants); printf("punctuation: %d ", punc);

return 0; }

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caseCons.txt content :

case 'b': case 'c': case 'd': case 'f': case 'g': case 'h': case 'j': case 'k': case 'l': case 'm': case 'n': case 'p': case 'q': case 'r': case 's': case 't': case 'v': case 'w': case 'x': case 'y': case 'z': case 'B': case 'C': case 'D': case 'F': case 'G': case 'H': case 'J': case 'K': case 'L': case 'M': case 'N': case 'P': case 'Q': case 'R': case 'S': case 'T': case 'V': case 'W': case 'X': case 'Y': case 'Z':

Part 2: Use pointers to return multiple values from a function and using