source file name: FarToCel.C

 #include<stdio.h>

int  main()

{

float F,C;

//clrscr();

printf("\n Enter Farhenheit temp.: ");

scanf("%f",&F);

C=(5*(F-32))/9;

printf("\n Centigrade temp.=%f",C);

//getch();

return 0;

}

output: