c语言中字符串函数的使用

#include<stdio.h>

#include<string.h>

/*

char s1[]="I am a student";

char s2[20]="teacher";

char s3[]="student";

int result;

char s4[20],*p;

1.串的长度

int strlen(char *str):

printf("%d\n",strlen(s1));//长度为14

printf("%d\n",strlen(s2));//长度为7

2.复制

char *strcpy(char *str1,char *str2):

strcpy(s4,s2);//把s2复制给s4

printf("%s\n",s4);//输出teacher

3.比較

int strcmp(char *str1,char *str2):

result=strcmp(s2,s3);

printf("%d\n",result);//s2>s3

4.字符串定位

char *strchr(char *str,char ch);

p=strchr(s1,‘s‘);//p指向在s1中字符‘s‘的位置

printf("%s\n",p);//输出student

5.子串查找

char *strstr(char *s1,char *s2);

p=strstr(s1,s3);//p指向在s1中字符‘s‘的位置

printf("%s\n",p);//输出student

6.连接

char * strcat(char *str1,char *str2):

strcat(s2,s3);

printf("%s\n",s2);//输出teacherstudent

*/

void ReverseName(char *name,char *newName){

char *p;

p=strchr(name,‘ ‘);//字符定位

*p=‘\0‘;

printf("%s\n",name);

printf("%s\n",p);

strcpy(newName,p+1);//复制

printf("--%s\n",newName);

strcat(newName,",");//连接

strcat(newName,name);//连接

*p=‘ ‘;

printf("%s\n",name);

}

int  main(){

char name[]="jie wang",newName[30];

ReverseName(name,newName);

printf("hello world\n");

return 0;

}