View source for c/io

===Macro constants===
{{dsc begin}}
{{dsc header|stdio.h}}
{{dsc macro const|EOF|nolink=true|integer constant expression of type {{c|int}} and negative value}}
{{dsc macro const|FOPEN_MAX|nolink=true|maximum number of files that can be open simultaneously}}
{{dsc macro const|FILENAME_MAX|nolink=true|size needed for an array of {{c|char}} to hold the longest supported file name}}
{{dsc macro const|BUFSIZ|nolink=true|size of the buffer used by {{lc|setbuf}}}}
{{dsc macro const|_IOFBF|nolink=true|title=_IOFBF<br>_IOLBF<br>_IONBF|argument to {{lc|setvbuf}} indicating fully buffered I/O<br>argument to {{lc|setvbuf}} indicating line buffered I/O<br>argument to {{lc|setvbuf}} indicating unbuffered I/O}}
{{dsc macro const|SEEK_SET|nolink=true|title=SEEK_SET<br>SEEK_CUR<br>SEEK_END|argument to {{lc|fseek}} indicating seeking from beginning of the file<br>argument to {{lc|fseek}} indicating seeking from the current file position<br>argument to {{lc|fseek}} indicating seeking from end of the file}}
{{dsc macro const|TMP_MAX|title=TMP_MAX<br>TMP_MAX_S|notes=<br>{{mark c11}}|nolink=true|maximum number of unique filenames that can be generated by {{lc|tmpnam}}<br>maximum number of unique filenames that can be generated by {{lc|tmpnam_s}}}}
{{dsc macro const|L_tmpnam|title=L_tmpnam<br>L_tmpnam_s|notes=<br>{{mark c11}}|nolink=true|size needed for an array of {{c|char}} to hold the result of {{lc|tmpnam}}<br>size needed for an array of {{c|char}} to hold the result of {{lc|tmpnam_s}}}}
{{dsc end}}