150312--Start learning pointers

• The introduction of pointer learning is still the process of exchanging two numeric values, which is mentioned in almost every book:

  1#include <stdio.h>2 voidInterchange (int*m,int*n);3 intMain ()4 {5     intx=1, y=3;6     7Interchange (&AMP;X,&AMP;Y);//transferring addresses to functions8printf"x=%d,y=%d\n", x, y);9     return 0;Ten          One }  A  - voidInterchange (int*m,int*N) - { the     inttemp; -      -temp=*m; -*m=*N; +*n=temp; -}

  The pointer p is a variable with a numeric address, and *p is the value stored in the address indicated by the pointer.

The above procedure solves the problem that return cannot return two quantities at the same time without using pointers.

150312--Start learning pointers