很多C代码

				/* 范例：7-16 */
				#include 
				#include 
				void main()
				{
				  printf("=====strcmp======\n");
				  char *s1 = "abc";
				  char *s2 = "arc";
				  printf("strcmp: %d\n",strcmp(s1,s2));
				  if(strcmp(s1,s2)				    printf("strcmp(s1,s2)				  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)				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