Posts by Lundin
This has probably been discussed before but I couldn't find any posts about it. I think we should re-make the sandbox category in the following way: Votes in the sandbox category should not c...
C (gcc), 57 64 bytes x,s;main(){scanf("%d",&x);s=sqrt(x);printf("%d",s*s==x);} Try it online!
I have a question about everyone's favourite Code Golf editor https://tio.run. After picking a language, is there a sensible way to enter command line arguments to it, other than adding them manual...
C, 534 bytes Strictly conforming program. #include <stdio.h> #include <stdlib.h> #include <string.h> char i=1,**c,**d,*t[30]={"red","yellow","green","brown","scarlet","blac...
C (gcc), 244 bytes main(){for(char*w=" bottles of beer on the wall",i=100;--i;)printf("%d%.*s%s, %d%.*s%.8s.\n%s, %d%.*s%s.\n\n",i,i-1?8:7,w,w+8,i,i-1?8:7,w,w+8,i^1?"Take one down and pass it ar...
C (gcc), 119 118 116 115 bytes #define p(x,y,z) printf(i^1?i^c?#z:#y:#x) i,j;f(c){for(i=1;i<=c;p(╗\n,╝\n,╣\n),i++)for(j=p(╔,╚,╠);j++<c;)p(╦,╩,╬);} Try it online! Function solution. I...
C (gcc), 43 bytes a[99];main(){printf("Hello, %s!",gets(a));} Try it online!
^ That can be used. You can try to contact the person who posted the challenge and have them mark the answer as "React -> Invalid". Or otherwise it seems that anyone can mark an answer as inva...
Taxi, 183 bytes Go to Writer's Depot:w 1 r 3 l 2 l."Hello, World!"is waiting at Writer's Depot.Pickup a passenger going to Post Office.Go to Post Office:n 1 r 2 r 1 l.Go to Taxi Garage:s 1 l 1 l 2...
C (compliant), 19 bytes (gcc -std=c18 -pedantic-errors) int main(){main();} Godbolt
C (gcc), 55 bytes a;f(char*s){for(;atoi(s)&128>>a&&a<4;a++);return 65+a;} Try it online! Just call atoi and start masking with 0x80. If true, keep looping and next che...
C (gcc), 41 bytes r;o(char*s){for(;*s;r+=*s++&1);return r;} Try it online! This is under the assumption that in a function solution, input has to be passed as parameter and output throug...
C (gcc), 42 bytes c;f(i){c++<8&&(printf("%d",i&1),f(i>>1));} Try it online! Binary output version.
C (gcc), 47 bytes r,c;f(i){return c++<8&&(r=r<<1|i&1,f(i>>1)),r;} Try it online! I didn't manage to come up with anything better than the most obvious recursive im...
C (gcc), 36 bytes f(int*p){for(;*p;putchar(32|*p++));} Try it online! Similar solutions: 36 bytes too but with new lines: f(int*p){for(;*p;*p|=32,puts(p++));} 37 bytes using recursion:...
C (gcc), 152 bytes r;e(c){r=c=='j'?5:strchr("bdfghklpqy",c)?4:c=='i'?3:c=='t'?2:1;}c;s;f(char*i,char*o){s?(e(*i),c=r,e(*o)):(qsort(i,strlen(i),s=1,f),puts(i));return r-c;} Try it online! Out...
C (gcc), 48 43 bytes s;r(n,m){s+=rand()%m+1;return--n?r(n,m):s;} Try it online! Previous 48 bytes version using loop: i,s;r(n,m){for(;i<n;i++)s+=rand()%m+1;return s;}
C (gcc), 20 bytes f(a){puts("!"+a%2);} Try it online! Function solution. Prints ! in case of even numbers, otherwise just new line.
For this to work, I think we need to rule out all start-up code (the C runtime) but also the register maps. So I think answers should be a void main (void){ ... } (or equivalent) function solution ...
C (gcc), 153 bytes a,b;f(char*s){for(char*c,*o="idso";*s;s++)for(c=o;*c;c++)*s==*c&&(b=c-o,a+=!b,a-=b==1,b==2?a*=a:0,b==3&&printf("%d%c",a,s[1]?44:10),a==-1|a==256?a=0:0);} Tr...
C (compliant), 106 bytes char r,i,s[80];void f(int n){memset(s,32,79);for(;r<n;puts(s),r++)for(i=0;i++<n*2;s[n-r-1]=47,s[n+r]=92);} Try it online! Standard C compliant function solutio...
C (compliant), 197 198 bytes. Golfed version of the function in the question, using X macros: #define L Y(1000,M)Y(900,CM)Y(500,D)Y(400,CD)Y(100,C)Y(90,XC)Y(50,L)Y(40,XL)Y(10,X)Y(9,IX)Y(5,V)Y(4,I...
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