Sscanf function Advanced usage stickers + Add)

Advanced sscanf function usage (post + Add)

 

As we all know, sscanf is a very useful function that can be used to retrieve integers, floating-point numbers, and strings from strings. It is easy to use, especially for integers and floating-point numbers. However, beginners may not know some advanced usage when processing strings. Here is a brief description.

 

1.Common usage.

Char STR [512] = {0 }; Sscanf ("123456", "% s", STR ); Printf ("str = % s/n", STR );

 

2.Returns the string of the specified length.In the following example, a string with a maximum length of 4 bytes is obtained.

Sscanf ("123456", "% 4 s", STR ); Printf ("str = % s/n", STR );

 

3.The string that ends with the specified character.For example, in the following example, the string is obtained when a space is encountered.

Sscanf ("123456 abcdedf", "% [^]", STR ); Printf ("str = % s/n", STR );

 

4.Take a string that only contains the specified character set.For example, in the following example, take a string that only contains 1 to 9 letters and lowercase letters.

Sscanf ("123456 abcdedfbcdef", "% [1-9a-z]", STR ); Printf ("str = % s/n", STR );

 

5.Obtains the string of the specified character set.For example, in the following example, a string with uppercase letters is used.

Sscanf ("123456 abcdedfbcdef", "% [^A-Z]", STR ); Printf ("str = % s/n", STR );

 

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6.Get the specified character and ignore other character strings.For example, in the following example, obtain the string to be located.

Sscanf ("Steven 23 Zhuhai", "% * s, % d, % s", age, city ); Printf ("str = % d/N", age );