Calculator Temperature converter

/* SIMPLE CALCULATOR AND TEMPERATURE CONVERTER */
#include<stdio.h>
int main()
{
    char fx;
        printf("What do You want??\n\n**Press S for Using Simple calculater\n\n**Or Press T for using Temperature converter\n");
    scanf("%c",&fx);
    printf("\n\n");


    if(fx=='s'||fx=='S')
    {

        int a,b;
        printf("Enter an integer number: ");
        scanf("%d",&a);
        printf("Enter another integer number: ");
        scanf("%d",&b);
        printf("\nSum is : %d\n",a+b);
        printf("\nSubstance is: %d \n",a-b);
        printf("\nMultipul is : %d\n",a*b);
        printf("\nDivision is : %d\n",a/b);
        printf("\nMudulas is : %d\n",a%b);
    }
    else if(fx=='t' ||fx=='T')
    {
        char enter,ch;
        printf("\nPress C for Celcise to Farenhite\nand Press F for Farenhite to Celcise\n");
        scanf("%c %c",&enter,&ch);
        if(ch=='c'|| ch=='C')
        {
            float celcise,farenhite;
            printf("Enter Celcise scale rading: ");
            scanf("%f",&celcise);
            farenhite=(1.8*celcise)+32;
            printf("\nFarenhite rading is : %f\n",farenhite);
        }
        else if(fx=='f'||fx=='F')
        {
            float celcise1,farenhite1;
            printf("Enter Farenhite scale rading: ");
            scanf("%f",&farenhite1);
            celcise1=.556*(farenhite1-32);
            printf("\nCelcise scale is: %f\n",celcise1);
        }
    }
}