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  • strchr

    strchr

     
      原型:extern char *strchr(const char *s,char c);
     
      const char *strchr(const char* _Str,int _Val)
     
      char *strchr(char* _Str,int _Ch)
     
      头文件:#include <string.h>
     
      功能:查找字符串s中首次出现字符c的位置
     
      说明:返回首次出现c的位置的指针,如果s中不存在c则返回NULL。
     
      返回值:Returns the address of the first occurrence of the character in the string if successful, or NULL otherwise
     
      举例1:(在Visual C++ 6.0中运行通过)
     
      #include <string.h>
     
      #include <stdio.h>
     
      int main(void)
     
      {
     
      char string[17];
     
      char *ptr, c = 'r';
     
      strcpy(string, "This is a string");
     
      ptr = strchr(string, c);
     
      if (ptr)
     
      printf("The character %c is at position: %d\n", c, ptr-string);
     
      else
     
      printf("The character was not found\n");
     
      return 0;
     
      }
     
      运行结果:The character r is at position: 12Press any key to continue
     
      举例2:
     
      // strchr.c
     
      #include <stdio.h>
     
      #include <string.h>
     
      int main()
     
      {
     
      char temp[32];
     
      memset(temp,0,sizeof(temp));
     
      strcpy(temp,"Golden Global View");
     
      char *s = temp;
     
      char *p,c='v';
     
      p=strchr(s,c);
     
      if(p)
     
      printf("%s",p);
     
      else
     
      printf("Not Found!");
     
      return 0;
     
      }
     
      运行结果:Not Found!Press any key to continue
     
      举例3:
     
      #include <stdio.h>
     
      #include <string.h>
     
      void main()
     
      {
     
      char answer[100],*p;
     
      printf("Type something:\n");
     
      fgets(answer,sizeof answer,stdin);
     
      if((p = strchr(answer,'\n')) != NULL)
     
      *p = '\0';
     
      printf("You typed \"%s\"\n",answer);
     
      }
     
      fgets不会像gets那样自动地去掉结尾的\n,所以程序中手动将\n位置处的值变为\0,代表输入的结束
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  • 原文地址:https://www.cnblogs.com/tao560532/p/2429234.html
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