NOT WORK:(

#include <stdio.h>
#include <math.h>
#include <conio.h>
int main ()
{
float a,b,f,x;
int m,n;
{
printf("Задайте интервал [a,b] \n");
scanf("%f %f",&a,&b);
printf("Введите шаг \n");
scanf(" %d",&m);
x=a;
n=1;
printf("                 Function f(x)=2tg(x/2)+1              \n");
printf("________________________________________________\n");
printf("|      n     |         x      |        f(x)    |\n");

for(;m>=b;n++);
{
f=2*tan(x/2)+1;
printf("|   %5d    |      %5.2f     |       %5.2f    |\n",n,x,f);
}


printf("________________________________________________\n");
printf("\n");
printf(" \n");
scanf(" ");
}}