1.    #include <stdio.h>
2.    int main()
3.    {
4.        float f,c;
5.        char ch;
6.        do
7.       {
8.            printf("\n");
9.            printf("input Fahrenheit: ");
10.            scanf("%f",&f);
11.            C = f-32 /1.8;
12.            printf("celsius    =%.f\n ",C);
13.            printf(‘’Press any key to continue or Esc exit:’’);
14.            C=getch();
15.       }
16.       While ( ch! =27);
17.    }