Revise paste Untitled

#include <stdio.h>
#include <string.h>
#define MAX 100

//ne menuvaj!
void wtf() {
    FILE *f = fopen("sp.txt", "w");
    char c;
    while((c = getchar()) != EOF) {
        fputc(c, f);
    }
    fclose(f);
}
void rff() {
    FILE *f = fopen("output.txt", "r");
    char c;
    while((c = fgetc(f)) != EOF) {
        putchar(c);
    }
    fclose(f);
}
int e_samoglaska(char c) {
    if(c == 'A' || c == 'a' || c == 'E' || c == 'e' || c == 'I' || c == 'i' || c == 'O' || c == 'o' || c == 'U' || c == 'u') {
        return 1;
    }
    return 0;
}

int main() {
    wtf();
    
    FILE *f = fopen("sp.txt", "r");
    FILE *out = fopen("output.txt", "w");
//    fprintf(out, "Zdravo");
//    if(f != NULL) { // toa znaci deka datotekata postoi
        int k;
        fscanf(f, "%d", &k);
        char c;
        fprintf(out, "%d\n", k);
        c = fgetc(f); // getchar()
        while((c = fgetc(f)) != EOF) { // EOF - end of file
            if(e_samoglaska(c) == 1) {
                int brojac = k;
                
                while(brojac > 0) {
                    fprintf(out, "%c", c);
                    brojac -= 1;
                }
            }
            else {
                fprintf(out, "%c", c);
            }
        }
        
//    }
    rff();
    return 0;
    
}