| /* File : example.c */ |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <ctype.h> |
| |
| /* Compute the greatest common divisor of positive integers */ |
| int gcd(int x, int y) { |
| int g; |
| g = y; |
| while (x > 0) { |
| g = x; |
| x = y % x; |
| y = g; |
| } |
| return g; |
| } |
| |
| int gcdmain(int argc, char *argv[]) { |
| int x,y; |
| if (argc != 3) { |
| printf("usage: gcd x y\n"); |
| return -1; |
| } |
| x = atoi(argv[1]); |
| y = atoi(argv[2]); |
| printf("gcd(%d,%d) = %d\n", x,y,gcd(x,y)); |
| return 0; |
| } |
| |
| int count(char *bytes, int len, char c) { |
| int i; |
| int count = 0; |
| for (i = 0; i < len; i++) { |
| if (bytes[i] == c) count++; |
| } |
| return count; |
| } |
| |
| void capitalize(char *str, int len) { |
| int i; |
| for (i = 0; i < len; i++) { |
| str[i] = (char)toupper(str[i]); |
| } |
| } |
| |
| void circle(double x, double y) { |
| double a = x*x + y*y; |
| if (a > 1.0) { |
| printf("Bad points %g, %g\n", x,y); |
| } else { |
| printf("Good points %g, %g\n", x,y); |
| } |
| } |