标签：des style blog http color os io 使用 ar
指针+1移动了相当于所指向类型的大小的字节
int a[3][4] = { { 0, 1, 2, 3 }, { 4, 5, 6, 7 }, { 8, 9, 10, 11 } };//二维数组int(*p)[4] = a; //数组指针printf("%d\n", p); //8322788 这是个第一行的行地址，类似于二级指针printf("%d\n", *p); //8322788 这是个第一行第一列的地址printf("%d\n", **p); //0 这是第一个值
#include <stdio.h>int main(){int a[3][4] = { { 0, 1, 2, 3 }, { 4, 5, 6, 7 }, { 8, 9, 10, 11 } };int(*p)[4] = a;for (int i = 0; i < 4;i++){for (int j = 0; j < 3; j++){printf("%d ",*(*(p+j)+i));}printf("\n");}return 0;}
#include <stdio.h>#include <string.h>void str_cpy( char * dest , const char * src){while(*dest++ = *src++);}int main(){char buf[100] = "aaaaaaaaaaaaaaaaaaaaaaaa"; //用来测试是否添加\0str_cpy(buf , "liuwei");printf("%s\n" , buf);return 0;}
- #include <stdio.h>
#include <string.h>void str_ncpy( char * dest , const char * src , int n){while( (*dest++ = *src++) && n--);*(dest-1) = 0;}int main(){char buf[5] = "aaaa";;str_ncpy(buf , "liuweinihao" , 6);printf("%s\n" , buf);return 0;}
#include <stdio.h>int main(){int i;char s[100] = "a刘威b";printf("%d\n", s[0]);printf("%d\n", s[1]);printf("%d\n", s[2]);printf("%d\n", s[3]);printf("%d\n", s[4]);printf("%d\n", s[5]);return 0;}
#include <stdio.h>#include <string.h>int mb_strlen(const char * p){int len = 0;while( *p ){len++;if(*p++ < 0)p++;}return len;}int main(){char *s = "a我b是c你d大e";int len = mb_strlen( s );printf("%d\n",len);return 0;}
标签：des style blog http color os io 使用 ar
原文地址：http://www.cnblogs.com/l6241425/p/3955051.html
