34 lines
639 B
C
34 lines
639 B
C
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#include <string.h>
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char *fmtmsg( char *format, ... )
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{
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char *msgbuf;
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int len;
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va_list arglist;
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va_start( arglist, format );
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len = vsnprintf( NULL, 0, format, arglist );
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va_end( arglist );
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len = len + 1 + 7;
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msgbuf = malloc( len );
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strcpy( msgbuf, "Error: " );
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va_start( arglist, format );
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vsnprintf( &msgbuf[7], len, format, arglist );
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va_end( arglist );
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return( msgbuf );
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}
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void main()
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{
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char *msg;
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msg = fmtmsg( "%s %d %s", "Failed", 100, "times" );
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printf( "%s\n", msg );
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free( msg );
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}
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