Counting characters, words, lines an paragraphs in C - c

Question

I'm trying to count the characters, words, lines an paragraphs in C from the stdin.
something is not working and I don't know why.
#include <stdio.h>
int main(int argc, char const *argv[])
{
int pCount=0, parCount=0, cCount=0, lCount=0;
double prom=0;
char c;
int newln_cnt=0;
while ((c=getchar())!=EOF){
cCount++;
switch (c)
{
case '\n':
newln_cnt++;
lCount++;
if (newln_cnt == 2)
{
parCount++;
newln_cnt = 0;
}
break;
case ' ':
pCount++;
break;
}
}
prom = (cCount / pCount);
printf("Total caracteres: %d \n", cCount);
printf("Cantidad palabras: %d \n", pCount);
printf("Cantidad líneas: %d \n", lCount);
printf("Cantidad párrafos: %d \n", parCount);
printf("Promedio longitud palabra: %f \n", prom);
return 0;
}
it kinda works with the characters (it shows one less). but the rest is all bad.
Input:
Oid, mortales, el grito sagrado:
"Libertad, libertad, libertad!"
Oid el ruido de rotas cadenas,
ved en trono a la noble igualdad.
Ya su trono dignisimo abrieron
las Provincias Unidas del Sud
y los libres del mundo responden:
"Al gran pueblo argentino, salud!
Al gran pueblo argentino, salud!"
Y los libres del mundo responden:
"Al gran pueblo argentino, salud!"
Sean eternos los laureles
que supimos conseguir,
que supimos conseguir.
Coronados de gloria vivamos...
o juremos con gloria morir!,
o juremos con gloria morir!,
o juremos con gloria morir!
Expected Ouput:
Total caracteres: 558
Cantidad palabras: 87
Cantidad líneas: 25
Cantidad párrafos: 8
Promedio longitud palabra: 4.966
my ouput:
Total caracteres: 557
Cantidad palabras: 69
Cantidad líneas: 24
Cantidad párrafos: 12
Promedio longitud palabra: 8.000
The program counts the number of characters, words, lines and paragraphs (two consecutive '\n'). and the averge word length .

Answer 1

Each your count conditions are wrong.
fix like follows:
#include <stdio.h>
#include <ctype.h>
int main(void){
int pCount=0, parCount=0, cCount=0, lCount=0;//word, paragraph, character, line
int abCount = 0;//alphabet
double prom=0;
int c;//It should be int.
char pprev = '\n', prev = '\n';
while ((c=getchar())!=EOF){
++cCount;
if(isalpha(c))
++abCount;
if(isspace(c)){
if(c == '\n'){
++lCount;
}
} else if(isspace(prev)){//isspace(prev) && !isspace(c) : edge of top of word
++pCount;
if(pprev == '\n' && prev == '\n'){//edge of top of paragraph
++parCount;
}
}
pprev = prev;
prev = c;
}
if(prev != '\n'){//If the file is not terminated by newline
++lCount;
}
prom = (double)abCount / pCount;//(cCount - spcCount - punctCount) / pCount
printf("Total caracteres: %d \n", cCount);
printf("Cantidad palabras: %d \n", pCount);
printf("Cantidad lineas: %d \n", lCount);
printf("Cantidad parrafos: %d \n", parCount);
printf("Promedio longitud palabra: %.3f \n", prom);
return 0;
}

Answer 2

I see several problem in your code:
Paragraphs count: you do not set newln_cnt to 0 if read character is different of \n. This will count one paragraph each time two \n are read.
Spaces count: you only consider ' ' characters, you may miss other white space characters like \t ou non breakable space. consider using isspace() function.
Mean line length: you divide two integers to get a float, consider casting:
prom = (float)cCount / (flao)pCount;
My advice: Start with a short text (3 words per line, 5 lines) and a debugger.

Answer 3

It didn't compile because of type conversion errors, but you can use floats for everything and it will compile:
#include <stdio.h>
int main(int argc, char const *argv[])
{
double pCount=0, parCount=0, cCount=0, lCount=0;
double prom=0;
char c;
int newln_cnt=0;
while ((c=getchar())!=EOF){
switch (c)
{
case '\n':
newln_cnt++;
lCount++;
if (newln_cnt == 2)
{
parCount++;
newln_cnt = 0;
}
break;
case ' ':
pCount++;
break;
}
}
prom = (cCount / pCount);
printf("Total caracteres: %f \n", cCount);
printf("Cantidad palabras: %f \n", pCount);
printf("Cantidad líneas: %f \n", lCount);
printf("Cantidad párrafos: %f \n", parCount);
printf("Promedio longitud palabra: %f \n", prom);
return 0;
}
Now that the program compiles, you can adjust to whatever types are best for you program, you might even have a type of your own.
A famous program that works like your program is wc - word count and is part of the standard Unix libraries.