StrComp_fin

#include <cstdio>

const int n = 256;
int len1, len2;
char voc[] = "aAeEiIoOuU";

bool str_find(const char* source, const char c)
{
    for (const char* pch = source; *pch; pch++) {
        if (*pch == c) {
            return 1;
        }
    }
    return 0;
}

int str_comp(char* str1, char* str2)
{
    if (*str1 && *str2) {
        if (str_find(voc, *str1)) {
            len1++;
        }
        if (str_find(voc, *str2)) {
            len2++;
        }
        return str_comp(str1 + 1, str2 + 1);
    } else if (*str1) {
        if (str_find(voc, *str1)) {
            len1++;
        }
        return str_comp(str1 + 1, str2);
    } else if (*str2) {
        if (str_find(voc, *str2)) {
            len2++;
        }
        return str_comp(str1, str2 + 1);
    } else {
        if (len1 == len2) {
            return 0;
        } else if (len1 > len2) {
            return 1;
        } else {
            return 2;
        }
    }
}

void str_copy(char* dst, const char* src)
{
    int i;
    for (i = 0; src[i]; i++) {
        dst[i] = src[i];
    }
    dst[i] = 0;
}

int main()
{
    char str1[n], str2[n];
    int res;
    FILE* fin, * fout;
    fin = fopen("poveste.in", "rt");
    fout = fopen("poveste.out", "wt");
    fscanf(fin, "%s", str1);
    while (!feof(fin)) {
        fscanf(fin, "%s", str2);
        res = str_comp(str1, str2);
        if (res == 1) {
            fprintf(fout, "%s\n", str2);
        } else {
            fprintf(fout, "%s\n", str1);
            str_copy(str1, str2);
        }
    }
    fprintf(fout, "%s\n", str1);
    fclose(fin);
    fclose(fout);
    return 0;
}