Program to count number of vowels,sentences and spaces in a paragraph

#include<stdio.h>

#include<string.h>

void main()

{

char line[80];

char vow[6]="aeiou";

int i,j,countv,countf,countsp,len;

countv=0;countf=0;countsp=0;

printf("\n enter the string");

scanf("%[^\n]",line);

len=strlen(line);

for(i=0;i<len;i++)

{

for(j=0;j<6;j++)

{

if(line[i]==vow[j])

countv++;

}

if(line[i]==' ')

countsp++;

else if(line[i]=='.')

countf++;

}

printf("\n the number of vowels is:%d\n the number of spaces is %d\n the number of strings is %d",countv,countsp,countf);

}