1. 字符串转数字
如将“32”转为32,将“3.1415”转为3.1415,将“567283”转为567283。使用:
//Convert string to integer, more @http://www.cplusplus.com/reference/clibrary/cstdlib/atoi/ int atoi ( const char * str ); //Convert string to double, more @http://www.cplusplus.com/reference/clibrary/cstdlib/atof/ double atof ( const char * str ); // Convert string to long integer,more @http://www.cplusplus.com/reference/clibrary/cstdlib/atol/ long int atol ( const char * str );
//Read formatted data from string, more @http://www.cplusplus.com/reference/clibrary/cstdio/sscanf/ int sscanf ( const char * str, const char * format, ...);
Example1:
Example1
Example2:
Example2
2. 数字转字符串
如将32转为“32”,将3.1415转为“3.1415”,将567283转为“567283”。使用:
//Write formatted data to string, more @http://www.cplusplus.com/reference/clibrary/cstdio/sprintf/ int sprintf ( char * str, const char * format, ... );
//Convert integer to string (non-standard function), more @http://www.cplusplus.com/reference/clibrary/cstdlib/itoa/ //This function is not defined in ANSI-C and is not part of C++, but is supported by some compilers. //A standard-compliant alternative for some cases may be sprintf. char * itoa ( int value, char * str, int base );
Example3:
Example3