c2f2c_2.c (1225B)
1 /* Exercise 5.24 */ 2 3 #include <stdio.h> 4 5 double celsius(double); 6 double fahrenheit(double); 7 8 int main() 9 { 10 double i, j; 11 int line = 9; /* number of entries for line */ 12 13 /* print 1st table */ 14 printf("\t\t\tFrom °C to °F (1-100)\n\n"); 15 for(i = 0.0; i < 100 ; i += line) { 16 printf("°C:\t"); 17 for(j = i; j < i + line && j <= 100; j++) 18 printf("%.1f\t", j); 19 20 printf("\n°F:\t"); 21 for(j = i; j < i + line && j <= 100; j++) { 22 printf("%.1f\t", fahrenheit(j)); 23 } 24 printf("\n"); 25 } 26 27 /* print 2nd table */ 28 printf("\n\t\t\tFrom °F to °C (32-212)\n\n"); 29 for(i = 32; i <= 212; i += line) { 30 printf("°F:\t"); 31 for(j = i; j < i + line && j <= 212; j++) 32 printf("%.1f\t", j); 33 34 printf("\n°C:\t"); 35 for(j = i; j < i + line && j <= 212; j++) 36 printf("%.1f\t", celsius(j)); 37 38 printf("\n"); 39 } 40 41 return 0; 42 } /* E0F main */ 43 44 /* convert from Celsius to Fahrenheit */ 45 double celsius(double fahrenheit) 46 { 47 /* °C=(5/9)x(°F-32) */ 48 return (5.0 / 9.0) * (fahrenheit - 32); 49 } /* eof celsius() */ 50 51 /* convert from Fahrenheit to Celsius */ 52 double fahrenheit(double celsius) 53 { 54 /* °F=(9/5)°C+32 */ 55 return (9.0 / 5.0) * celsius + 32; 56 } /* eof fahrenheit() */ 57