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)
頭文件:#include <string.h>
功能:查找字符串s中首次出現字符c的位置
說明:返回首次出現c的位置的指針,如果s中不存在c則返回NULL。
返回值:Returns the address of the first occurrence of the character in the string if successful, or NULL otherwise
舉例1:(在
Visual C++ 6.0中運行通過)
#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;
}
運行結果:The character r is at position: 12Press any key to continue
舉例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;
}
運行結果:Not Found!Press any key to continue
舉例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不會像gets那樣自動地去掉結尾的\n,所以程序中手動將\n位置處的值變為\0,代表輸入的結束
