C program to convert temperature from Fahrenheit to Celsius or Celsius to Fahrenheit

#include<stdio.h>
#include<conio.h>

void main()
{
double temp,ctemp;
int ch;
clrscr();    //to clear the screen

    printf(“Temprature Converrsion Menu”);
printf(“nt1.Fahrenheit to Celsius”);
printf(“nt2.Celsius to Fahrenheit”);
printf(“nEnter your choice(1/2):”);
scanf(“%d”,&ch);

if(ch==1)
{
printf(“Enter Temperature in Fahrenheit:”);
scanf(“%lf”,&temp);
ctemp=(temp-32)/1.8;
printf(“nTemprature in celcius is %lf”,ctemp);
}
else
if(ch==2)
{
printf(“Enter Temperature in Celsius:”);
scanf(“%lf”,&temp);
ctemp=(1.8*temp)+32;
printf(“nTemperature in Fahrenheit is %lf”,ctemp);
}
else
printf(“nWrong choice…..!!”);
getch();    //to stop the screen
}

2 thoughts on “C program to convert temperature from Fahrenheit to Celsius or Celsius to Fahrenheit

    1. Neeraj Mishra

      Yes, you can write and run a c program without any header files. The following program will compile an run fine.

      int main()
      {
      int i;
      return 0;
      }

      To perform any operation you need functions and to use functions you have to include header files in your program. So, it will be no use of a program without header files.

      Reply

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