Add pointer practice

pointer/test5.c

@@ -16,7 +16,6 @@ int main()
     //int (*f)(int);
     int (*f[4])(int) = {f10, f5, f1, f22};
     printf("%d\n", f[2](10));
-    printf("%d\n", f[b%4](10));
     //f = f10; //f= &f10을 해도 똑값다
     //printf("%d\n", f(a));
 

pointer/test6.c

+#include <stdio.h>
+
+int f10(int a)
+{	return a+10; }
+int f5(int a)
+{	return a+5; }
+int f1(int a)
+{	return a+1; }
+int f22(int a)
+{	return a+22; }
+
+
+
+int main()
+{
+	double (*f[10])(int const *a, double (*g[10])(double h)); 
+	int (*q)(int, int, double); 
+
+	int a = 200; 
+	int (*ff)(int); 
+	ff = f10; 
+	printf("%d\n", ff(a)); 
+	
+}

pointer/test7.c

+#include <stdio.h>
+
+float f_f() {return 100.0; }
+int f_i() {return 100; }
+
+
+int main()
+{
+	int (*f)(void); 
+	float (*ff)(void); 
+	f = f_i; 
+	printf("%d\n", f()); 
+	ff = f_f; 
+	printf("%f\n", ff()); 
+}