请达人详解~~

ivanfan

how to use the functions "sprintf()"and"sscanf()"??
i'm not sure the mean of these parameters~~
help me~~thx~~~

or explain the following codes:

1. sprintf(buffer,"%d",file_pipes[0]);
   
2. sscanf(argv[1],"%d",&file_descriptor);

复制代码

thx!!  

herberteuler

The sprintf function is equivalent to fprintf, except that the output is written into an array (specified by the argument s) rather than to a stream. A null character is written at the end of the characters written; it is not counted as part of the returned value. If copying takes place between objects that overlap, the behavior is undefined.

The sscanf function is equivalent to fscanf, except that input is obtained from a string (specified by the argument s) rather than from a stream. Reaching the end of the string is equivalent to encountering end-of-file for the fscanf function. If copying takes place between objects that overlap, the behavior is undefined.

-- from ISO/IEC 9899:1999, Programming languages - C

ivanfan

O~~it's too hard to read~~T_T
luckily,i have an electronic dictionary~~
though it spends me too much time,i'm very happy for the new knowledge and your answer!!!!!   
thk you!!!