#include <stdio.h>
#define MAXMASSIVESIZE 10000


void setmass(int *massSize);
int fillmass(int massSize, int *massive);
void viewmass(int massSize, int *massive);
void selfunc(int massive[]);
int flush(void);

int main() {
    int enter,
    q = 1,
    massSize = 0,
    massCreated = 0,
    massive[MAXMASSIVESIZE];
    printf("Test massives and pointers\n");

    do{
        printf("\t\tMain menu\n");
        printf("\tMassive manipulation\n");
        printf("a. SetMassiveSize\n");
        printf("b. FillMassive\n");
        printf("c. ViewMassive\n\n");
        printf("\tExit - g\n\n\n");
        enter = getchar();
        if(flush())return 1;
        switch(enter){
            case'a':case'A':
                setmass(&massSize);
                break;
            
            case'b':case'B':
                if(massSize!=0){massCreated = fillmass(
                    massSize,massive);flush();}
                else printf("\n\tSet massive size first.\n\n");
                break;
            
            case'c':case'C':
                if(massCreated){viewmass(massSize,massive);}
                else printf("\n\tFill Massive first.\n\n");
                break;
            
            case'd':
                if(massCreated){selfunc(massive);flush;}
                else printf("\n\tFill Massive first.\n\n");
                break;
            
            case'g':case'G':
                q=0;break;            

            default: printf("Input Err\n\n");break;
        }
     }while(q);
    return 0;
}


void setmass(int *massSize){
    printf("\t\tSetMassiveSize\n");
    printf("Set Massive Size - input integer\n");
    printf("Exit from this menu - input 0\n\n\n");
    printf("Input: ");
    int n;
    while(scanf(" %d",&n)!=1||n>MAXMASSIVESIZE){
        if(flush())return;
        flush();
        if(n>10000)printf("Input cannot be >%d",MAXMASSIVESIZE);
        printf("Input Err\nInput: ");
    }

    flush();

    if(n==0)
        return;
    else
        *massSize = n;
    return;
}

int fillmass(int size, int *massive){
    printf("\t\tFill Massive\n");
    printf("You can devide elements with space or enter.\n");
    printf("You also can decide to from which element start with e.\n");
    printf("To exit input g.\n\n\n");
    printf("Input: ");


    int x, i, e1,e = 0, p=-1, minus = 0;

    for(i = 0;i < size;i++){
        e1 = e = massive[i] = 0;
        while(((x = getchar()) != '\n' && x !=' ' 
            && x != EOF && x != 4) 
            && ((x>='0' && x<='9') 
            || x == 'e' || x == '-'))
            {
            if (x == 'e')e1=1;
            else if (e1) e = (e*10)+(x-'0');
            else if (x == '-' && massive[i]==0)minus=1;
            else massive[i] = (massive[i]*10) + (x-'0');
            }

        if(x == EOF || x == 3){return 0;}
        if(minus && (x == '\n' || x == ' ')){minus = 0; massive[i]*=-1;}
        if(e>size) printf("e is out of range.\n");
        else if(e1) {i = e - 1;putchar('\n');}
        if(x == 'g'){return 1;}
        if(x!='\n' && x!=' ' && x!='e' && x!='-' && !(x>='0'&&x<='9'))
            {while((x=getchar())!='\n'&&x!=' '&&x!=EOF&&x!=4);i--;}
        if(p!=i&&e1!=1)
            printf("Massive - [%d]\t%d\n",i,massive[i]);
        p=i;
    }
    return 1;
}


void viewmass(int size, int *massive){
    printf("\t\tView Massive\n");
    for(int i = 0; i < size; i++){
        printf(" | [%6d]\t%p\t%d\n",i,massive[i],massive[i]);
    }
}


void selfunc(int *massive){
    printf("\tFunctions\t(my - 7|16|24)\n");
    printf("1. \t2. \t3. \n");
    printf("4. \t5. \t6. \n");
    printf("7. \t8. \t9. \n");
    printf("10. \t11. \t12. \n");
    printf("13. \t14. \t15. \n");
    printf("16. \t17. \t18. \n");
    printf("19. \t20. \t21. \n");
    printf("22. \t23. \t24. \n");
    printf("25. \t26. \t27. \n");
    printf("28. \t29. \t30. \n\n");
    printf("\tExit - 0\n");

    int n;
    while(scanf(" %d",&n)!=1){
        if(flush())return;
        printf("Input Err\nInput: ");}
    flush();
        return;
    switch(n){
        case 1:

    }
}

int flush(void){
    int x;
    while((x = getchar())!='\n' && x!=4 && x!=1)
        if(x==EOF)return 1;
    return 0;
}