嵌入式工程师面试题--经典

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1、1、将一个字符串逆序 2、将一个链表逆序 3、计算一个字节里(byte)里面有多少bit被置1 4、搜索给定的字节(byte) 5、在一个字符串中找到可能的最长的子字符串 6、字符串转换为整数 7、整数转换为字符串style=MARGIN: 0px; COLOR: rgb(102,102,102); LINE-HEIGHT: 150% wrap=break-word1、char *strconv(char *p) int i,length; char temp; length = strlen(p); for(i = 0;i length/2;i+) temp = *(p + i); *(p

2、+ i) = *(p + length - 1 - i); *(p +length - 1 - i) = temp; return p;int main() char src100; char *p; scanf(%s,src); p = strconv(src); printf(%sn,p); return 0;style=MARGIN: 0px; COLOR: rgb(102,102,102); LINE-HEIGHT: 150% wrap=break-word3、int cal(int data) /calculation the number of bit in one byte in

3、t a; int count = 0; a = data % 100; while (a != 0) count += a % 2; a /= 2; return count;int main() int d,count; scanf(%d,&d); count = cal(d); printf(%d of onen,count); return 0;style=MARGIN: 0px; COLOR: rgb(102,102,102); LINE-HEIGHT: 150% wrap=break-word4、#include#includevoid findmax(char *p) int j

4、= 0,max = 0; int count = 0; char record200; char recordmax200; for(int i = 0;i+) if(*(p + i) = ) | (*(p + i) = 0) if(count max) max = count; recordj = 0; strcpy(recordmax,record); count = 0; j = 0; else recordj = *(p + i); count +; j +; if(*(p + i) = 0) break; printf(%sn,recordmax); int main() char

5、str=zeng weidsfdsaf langd hah; printf(%sn,str); findmax(str); return 0;style=MARGIN: 0px; COLOR: rgb(102,102,102); LINE-HEIGHT: 150% wrap=break-word#include#include#includetypedef struct shopping char goods100; struct shopping *next;SHOP;SHOP *buildlink() /创建链表 char goods100; SHOP *head,*p,*h; p = (

6、SHOP *)malloc(sizeof(SHOP); head = p; head-next = NULL; printf(Input three goods:); for(int i = 0;i goods,goods); p-next = NULL; if(head-next = NULL) head-next = p; h = p; else h-next = p; h = h-next; return head;void showlink(SHOP *head) /显示链表 SHOP *p; p = head-next; while(p != NULL) printf(%s ,p-g

7、oods); p = p-next; printf(n);SHOP *revlink(SHOP *head) /反转链表 SHOP *p,*newp; p = head-next; head-next = NULL; while(p != NULL) newp = p; p = p-next; newp-next = head-next; head-next = newp; return head;int delnode(SHOP *head,char *str) /delete success return 1,else return 0 SHOP *q,*p = head; while(p

8、-next != NULL) q = p; p = p-next; if(!strcmp(str,p-goods) q-next = p-next; free(p); /p = q-next; return 1; return 0; int main() SHOP *head; SHOP *newhead; head = buildlink(); showlink(head); newhead = revlink(head); showlink(newhead); showlink(head); printf(Delete a node:); char str50; scanf(%s,str)

9、; int i; i = delnode(head,str); showlink(head); if(i = 1) printf(Delete successful!n); return 0;style=MARGIN: 0px; COLOR: rgb(102,102,102); LINE-HEIGHT: 150% wrap=break-word#include#include#includetypedef struct shopping char goods100; struct shopping *next;SHOP;SHOP *buildlink() /创建链表 char goods100; SHOP *head,*p,*h; p = (SHOP *)malloc(sizeof(SHOP); head = p; head-next = NULL; printf(Input three goods:); for(int i = 0;i 3;i+) scanf(%s,goods); p = (SHOP *)malloc(sizeof(S

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