[stigmatas]

hey, I got this code, but my brother needs it in terms of printf,scanf,if,for,while u know, and i uses cin,cot and those stuff... i don't remember how to write in the terms he want.. somebody can help us

this is his hw:

Calculate the value of pie from teh infinite series
pie = 4 - 4/3 + 4/5 - 4/7 + 4/9 - 4/11 +...
Print a table that shows the value of pie approximated y 1 term of this series,
by two terms, by three terms etc. How many terms of this series do you hve
to use before you first get 3.14? 3.141? 3.1415?

thanks!

#include <iostream>
using namespace std;

int main()
{
     float pi = 4, n;
     int j = 0, s = -1;
     cout << "n: ";
     cin >> n;

     cout.precision(18);
     for(float i = 3; j < n; i += 2, j++, s *= -1)
     {
          pi += (4.0F / i) * s;
          cout << j + 1 << ". " << pi << endl;
     }

     system("pause");
     return 0;
}

[virxen]

try this

#include <stdio.h>

int main(){
     float pi = 4, n;
     int j = 0, s = -1;
     printf("\ngive n:");
     scanf("%f",&n);getchar();
     for(float i = 3; j < n; i += 2, j++, s *= -1){
          pi += (4.0F / i) * s;
          printf("\n%d> %f",(j+1),pi);
     }
     getchar();
     return 0;
}

[stigmatas]

wow thank you so much!!! perfect!