Course work - 1,1,1,1

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

char dirname[256],fname[256],path[512];
char* chooseDir() {
        DIR *dir = NULL;
        FILE *f;
    struct dirent *pent = NULL;
        while(dirname != 0){
                printf(".Choose directory and file:");
                scanf("%s",dirname);
                dir = opendir(dirname);
                printf("%s",dirname);
                printf("Choose file:\n");

                while((pent= readdir(dir))!=NULL){
                        printf("%s\n",pent->d_name);
                }

                scanf("%s",fname);
                char wholeName[512];
                strcpy(wholeName,dirname);
                strcat(wholeName,"/");
                strcat(wholeName,fname);
                strcat(path,wholeName);

                while((f=fopen(wholeName,"r"))==NULL){
                        printf("The file does not exist!\n please choose file: ");
                        scanf("%s",fname);
                        strcpy(wholeName,dirname);
                        strcat(wholeName,"/");
                        strcat(wholeName,fname);
                        strcat(path,wholeName);
                }
                closedir (dir);
                return dir;
        }
}

void countLines()
{
        int c;
        int lines = 0;
        FILE *selectedFile;
        selectedFile = fopen(path,"r");
        c = getc(selectedFile);

        while (c != EOF)
        {
                if(c == '\n') lines++;
                c = getc(selectedFile);
        }

        fclose(selectedFile);
        printf("\n\nRows in %s are : %d\n",fname, lines);
}

void avgChRowToAllCh()
{
        int charsInLIne = 0,chars = 0,c;
        FILE *selectedFile;
        selectedFile = fopen(path,"r");
        c = getc(selectedFile);

        while (c != EOF)
        {
                chars++;
                c = getc(selectedFile);
        }
        fclose(selectedFile);
        FILE *fp;
        fp = fopen(path,"r");
        c = getc(fp);
        int line = 1;
        printf("\n");
        printf("-------------------------------------------------\n");
        printf("Line       *   Chars in line       All chars\n");
        printf("-------------------------------------------------\n");

        while(c != EOF){
                c = getc(fp);
                if(c == '\n'){
                        printf("Line:%-5d *   Chars in line:%-5d All chars:%d  \n",line,charsInLIne,chars);
                        printf("-------------------------------------------------\n");
                        charsInLIne = 0;
                        line ++;
                }
                charsInLIne++;

        }
        fclose(fp);
}

void countComments()
{
        int comments = 0, c;
        FILE *selectedFile;
        selectedFile = fopen(path,"r");
        c = getc(selectedFile);
        int newLine = 1;
        int left = 0;
        int right = 0;
        while(c != EOF){
                c = fgetc(selectedFile);
                if(c == '\n'){
                        newLine = 1;
                }
                if(c == '/' && newLine == 1){
                        c = fgetc(selectedFile);
                        if(c == '/'){
                                comments++;
                                newLine = 0;
                                }
                        }
        }
        //
        FILE *fp;
        fp = fopen(path,"r");
        c = getc(fp);
        while(c != EOF){
                c = fgetc(fp);
                if(c == '/'){
                        c = fgetc(fp);
                        if(c == '*'){
                                left++;
                                }
                        }
                if(c == '*'){
                        c = fgetc(fp);
                        if(c == '/'){
                                right++;
                                }
                        }
                }
        int commentsToAdd,diff = 0;
        if(left > right){
                diff = abs(left - right);
                commentsToAdd = left - diff;
                } else if(right > left){
                        diff = abs(left - right);
                        commentsToAdd = (right - diff);
                        } else {
                                commentsToAdd = left;
                                }
        comments += commentsToAdd;
        printf("\n");
        printf("\nAll comment in %s are:%d\n",fname, comments);
}
int main ()
{
    char menu;
        do{
                printf("---Directory: %s  selected file: %s",dirname,fname);
                printf("\n1. Select a directory: \n");
                printf("2. Number of rows in program\n");
                printf("3. Average symbols in rows : all symbols \n");
                printf("4. Shows the number of all comments.\n");
                printf("5. Quit\n");
                menu = getche();
                switch(menu){
                        case '1': chooseDir();break;
                        case '2': countLines();break;
                        case '3': avgChRowToAllCh();break;
                        case '4': countComments( );break;
                        case '5': printf("\n\Bye Bye !!!");break;
                        default: printf("\n\nPlease enter number between 1-5");
                }
        }while(menu!= '5');
        return 0;
}