laba_2 СИ

#include <conio.h>
#include <math.h>
#include <stdio.h>
#include <windows.h>
main() {

    SetConsoleCP(1251);
    SetConsoleOutputCP(1251);
    float a, b, i, z, stepen_e, stepen_i_2,
          N__of__steps, point__start, point__finish, one__step ;
    char Error_exit[] = "NoRezult";
    printf("Vvedite a: ");
    scanf("%f",&a);
    printf("Vvedite b: ");
    scanf("%f",&b);
    printf("Vvedite nachalo otschoyta:  ");
    scanf("%f",&point__start);
    printf("Vvedite konets otschoyta:  ");
    scanf("%f",&point__finish);
    printf("Vvedite kollich sagov:  ");
    scanf("%f",&N__of__steps);

// Shapka tablitsy
    printf("Tablitsa znacheniy funktsii z=f(i)\n");
    printf(" ______________________________\n");
    printf(" |   z = f(i) |       i       |\n");
    printf(" |____________|_______________|\n");


//funktsiay iz 1 laboratornoi raboty
    float laba__N__1(float a, float b, float i, float stepen_e, float stepen_i_2) {
        if (i<=a) {
            if  ((i<=a)&&(i<0)) {
                z = 0;
                goto loop1;
            }
            z=log(pow(27,((float)1/3))+sqrt(i)+sin(i)+cos(i));    //pow(i,y) — i^y
        } else if ((a<i)&&(i<b)) {
            stepen_e=cosh(i)+tanh(i);
            stepen_i_2=pow(i,2);
            z=  pow( (pow(tan(i),2)+1.3*exp(stepen_e)) ,  stepen_i_2);
        } else if (i >= b) {
            if  ((i>=b)&&(i>=1))  {
                z=0;
                goto loop1;
            } else if  ((i>=b)&&(i<0)) {
                z=0;
                goto loop1;
            }
            z=fabs(sin(i)-0.11)*acos(i) +  pow(i, asin(i));
            return z;
            exit(0);
loop1:
            return z;
        }
    }

    i=point__start; // начальное значение аргумента i
    one__step=(point__finish-point__start)/N__of__steps;
    while (i<=point__finish) {
//    laba__N__1(a, b,  i, stepen_e, stepen_i_2);  // run function
        laba__N__1(a, b,  i, stepen_e, stepen_i_2);  // run function
        if (z!=0) { // вывод строки таблицы
            printf(" |  ");printf("%f",z);printf("  |");printf("    ");printf("%f",i);printf("   |\n");
        } else {printf(" |  ");printf("%s",Error_exit); printf("  |");printf("    ");printf("%f",i);printf("   |\n");
        }
        i+=one__step; // приращение аргумента i
    }

    printf(" |____________|_______________|\n");
    printf("  press any button...");
    getch();
    return 0;
}