Convert celsius to farenheit

Input   Temperature in Celsius.      
Output  Temperature in Fahrenheit.       
complexity O(1)    
  
CelsiustoFahrenheit(Tc)  
1 Tf = (9/5)*Tc+32;   
2 print Tf.  

//To convert the temperature from Celsius to Fahrenheit
//Input : Enter any integer

#include< stdio.h>
#include< conio.h>
int main()
{
    int cel;
    float fah;
    printf("Enter temperature in Celsius to be converted to Fahrenheit ");
    scanf("%d",&cel);
    fah=(float)(9/5)*(cel)+ 32;
    printf("Temperature in Celsius is %f",fah);
}