Road to Coder _指向函數的指針

 
 

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函數'及算法加深table

 






#include"stdio.h" main() { int max(int, int); int min(int,int); int add(int,int); int fun(int x, int y, int(*p)(int, int)); int (*p)(int, int); int a, b, c,n; printf("please enter a and b:"); scanf_s("%d%d",&a,&b); printf("please choose 1 or 2 or 3: "); scanf_s("%d",&n); /* if (n == 1)p = max; else if (n == 2) p = min; else if (n == 3)p = add; c = (*p)(a, b); if(n==1) printf("a=%d,b=%d,max=%d",a,b,c); else if(n==2) printf("a=%d,b=%d,min=%d", a, b, c); else if(n==3) printf("a=%d,b=%d,add=%d", a, b, c);*/ if (n == 1)fun(a, b, max); else if (n == 2)fun(a, b, min); else if (n == 3)fun(a, b, add); getch(); } int fun(int x, int y, int(*p)(int, int)) { int result; result = (*p)(x,y); printf("result is :%d",result); } int min(int x, int y) { int z; if (x < y) z = x; else z = y; printf("min=%d", z); } int max(int x, int y) { int z; if (x > y) z = x; else z = y; return z; printf("max=%d", z); } int add(int x,int y) { int z; z = x + y; return z; printf("add=%d", z); }

 

 

 

please enter a and b:500 499
please choose 1 or 2:2
a=500,b=499,max=500

 

please enter a and b:500 499
please choose 1 or 2:2
a=500,b=499,min=499 

 

please enter a and b:500 499
please choose 1 or 2 or 3: 3
a=500,b=499,add=999

                                                                                          _by genmer

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