I want to write a C function that will print 1 to N one per each line on the stdout where N is a int parameter to the function. The function should not use while, for, do-while
write all possible output to a string first, and null terminate it where the output should stop.
this is a rather dirty solution, but given the limitations, all I can think of,
except for using assembler, off course.
char a[]="1\n2\n3\n4\n5\n6\n7\n8\n9\n10\n11\n12\n13\n14\n15\n16\n17\n"/*...*/;
main(n,v)char**v;{n=atoi(v[1]);
#define c(x)(n>x?n-x:0)
a[n+c(1)+c(9)+c(99)+c(999)+c(9999)+c(99999)+c(999999)+c(9999999)/*+...*/]=0;
puts(a);}
Given that MAX_INT==2147483647
on popular architectures, we only need to go up to +c(999999999)
. Typing out that initial string might take a while, though...