text: #include <stdio.h> 
  
  int main() {
    float fahr, celsius; 
    int lower, upper, step;
    lower = 0;
    upper = 300;
    step = 20;
    fahr = lower;
    while (fahr <= upper) {
      celsius = 5.0 * (fahr - 32) / 9.0;
      printf("%3.1fF\t=\t%6.2fC\n", fahr, celsius);
      fahr += step;
    }
   
  }
  