Input Fahrenheit Temperatures. Conversion into Celsius. C=(f-32)*5/9

 #include<stdio.h>
main()
{
    float f,c=0.0;
    printf("\nEnter Fahrenheit Temperatures : ");
    scanf("%f",&f);
    c=(f-32)*5.0/9.0;
    printf("\nCelsius = %f",c);

}

Result