C语言完美演绎7-16

/* 范例：7-16 */

#include <stdio.h>

#include <string.h>

void main()

{

printf("=====strcmp======\n");

char *s1 = "abc";

char *s2 = "arc";

printf("strcmp: %d\n",strcmp(s1,s2));

if(strcmp(s1,s2)<0)

printf("strcmp(s1,s2)<0\n");

char *s3 = "aar";

char *s4 = "aaadef";

printf("strcmp: %d\n",strcmp(s3,s4));

if(strcmp(s3,s4)>0)

printf("strcmp(s3,s4)>0\n");

char *s5 = "abcd";

char *s6 = "abcd";

printf("strcmp: %d\n",strcmp(s5,s6));

if(strcmp(s5,s6)==0)

printf("strcmp(s5,s6)=0\n");

printf("=====strlen======\n");

printf("strlen(s6): %d\n",strlen(s6));

printf("=====strchr======\n");

char *string = "tiger is brave";

char *ptr, c = 'e';

ptr = strchr(string,c);

printf("strchr(string,c): %c\n",*ptr);

if (*ptr==c)

printf("字符'%c'在字符串tiger is brave的第%d个位置\n", c, \ (ptr-string)+1);

printf("=====strstr======\n");

char *str1 = "tiger is brave", *str2 = "ra", *strptr;

strptr = strstr(str1, str2);

printf("%s\n", strptr); /* 输出字符指针strptr所指向地址到'\0'的字符串 */

getchar();

}

程序执行结果：

=====strcmp======

strcmp: -16

strcmp(s1,s2)<0

strcmp: 17

strcmp(s3,s4)>0

strcmp: 0

strcmp(s5,s6)=0

=====strlen======

strlen(s6): 4

=====strchr======

strchr(string,c): e

字符'e'在字符串tiger is brave的第4个位置

=====strstr======

rave