[ferget]

что-то вроде этого

Код:

#include <stdio.h>
#include <stdlib.h>

bool print2(const char *b, const char *e)
{
    int cnt=0;
    for( const char* p = b; p != e; p++ )
         if (!(( *p=='a' || *p=='o' || *p=='e' || *p=='u' || *p=='y' || *p=='i')||
              (  *p=='A' || *p=='O' || *p=='E' || *p=='U' || *p=='Y' || *p=='I')))                                                           
            cnt++;
            
    if(cnt%2==1)
       return false;
    else
       return true; 
}


int main()
{
    
    char s[80];
    FILE *file;
 
    file = fopen("input.txt","r");
    if(!file)
    {
        printf("File don't open\n");
        exit(-1);
    }
    
    file2 = fopen("output.txt","w");
    if(!file2)
    {
        printf("File don't open\n");
        exit(-1);
    }
 
    while(!feof(file))
    {
        fscanf(file,"%s", &s);
        
        if(print2(что тут писать не понятно))
        {
            fprintf(file2, "%s ", s);
        }
        else
        {
            fprintf(file2, "%s ", " ");
        }
    }
    
    fclose(file);
    fclose(file2);
    return 0;
}