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strstr

提供: cppreference.com
< c‎ | string‎ | byte

 
 
 
NULL終端バイト文字列
機能します
Original:
Functions
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文字操作
Original:
Character manipulation
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数値形式への変換
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Conversions to numeric formats
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文字列操作
Original:
String manipulation
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strcpy
strncpy
strcat
strncat
strxfrm
文字列の検査
Original:
String examination
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メモリ操作
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Memory manipulation
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memchr
memcmp
memset
memcpy
memmove
その他
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Miscellaneous
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strerror
 
Defined in header <string.h>
const char *strstr( const char* str, const char* substr );
      char strstr(        char* str, const char* substr );
substrが指すバイト文字列のバイト列strの最初の出現箇所を検索.
Original:
Finds the first occurrence of the byte string substr in the byte string pointed to by str.
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目次

[編集] パラメータ

str -
検討するNULL終端バイト文字列へのポインタ
Original:
pointer to the null-terminated byte string to examine
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substr -
を検索するためのNULL終端バイト文字列へのポインタ
Original:
pointer to the null-terminated byte string to search for
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[編集] 値を返します

str、またはNULLで見つかった部分文字列の最初の文字へのポインタは、そのような部分文字列が見つからない場合。 substrが空の文字列を指している場合、strが返されます。.
Original:
Pointer to the first character of the found substring in str, or NULL if no such substring is found. If substr points to an empty string, str is returned.
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[編集]

#include <string.h>
#include <stdio.h>
 
void find_str(char const* str, char const* substr) 
{
    char* pos = strstr(str, substr);
    if(pos) {
        printf("found the string '%s' in '%s' at position: %d\n", substr, str, pos - str);
    } else {
        printf("the string '%s' was not found in '%s'\n", substr, str);
    }
}
 
int main(int argc, char* argv[]) 
{
    char* str = "one two three";
    find_str(str, "two");
    find_str(str, "");
    find_str(str, "nine");
    find_str(str, "n");
 
    return 0;
}

Output:

found the string 'two' in 'one two three' at position: 4
found the string '' in 'one two three' at position: 0
the string 'nine' was not found in 'one two three'
found the string 'n' in 'one two three' at position: 1

[編集] も参照してください

文字の最初のオカレンスを検索します
Original:
finds the first occurrence of a character
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(機能) [edit]
文字が最後に出現する位置を検索します
Original:
finds the last occurrence of a character
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(機能) [edit]