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C (compliant), 194 bytes 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...
#3: Post edited
by
Lundin
·
2025-04-09T06:57:30Z (about 1 month ago)
# C (compliant), 197 <strike>198</strike> bytes.- Golfed version of the function in the question, using X macros:
```c#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,IV)Y(1,I)return r;#define Y(n,R)for(;v>=n;v-=n)strcat(r,#R);char r[99];char*f(int v){L}```This function abuses static initialization so it can only be called once. By adding `*r=0;`, we can call it multiple times during testing, which is why the code in the TIO link below looks slightly longer.<a href="https://tio.run/##XZJBb4MgFMfvfgqSXqDBFZOu0Th7oRcSeunB0Cw7GNSWpMMGrZemX30O7BbYuLy/v9/D9w7I@CTltFBaXm51A976oVbdy3kbhcgofbJsWtRNq3QDODjChBCC9@gIM1upC6827GxdO@BC4sLcgQWdGzCfPRZ81lg4i5krr7h0DjNXEsyQaYab0cDk4OdEv@OPUOMDajsD83Fb6HyMC43slrIaoMGLA8ojea4MMO9Z9pG7uGyh0gMY0X1pCpLzx@Q@PyulARw7VaPoHgFwvQ09bGGC0DxztQLM09TTkrFAZEG7CP5CntzigK7XnnJWerHZbGZjxY5yUYaTCfGK0kCkaSi4EOLfav4m3Qc4yzwW9O/WzytW7aPH9CXbS3Xqp9g@i0Im6RRfm7rSg5JxY0xn@m8" title="C (gcc) – Try It Online">Try it online!</a>- ---
- It can be minimized a bit further with non-compliant gcc tricks.
- # C (compliant), 194 bytes <strike>197 198</strike> bytes.
- Golfed version of the function in the question, using X macros:
- <!-- language-all: lang-c -->
- #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,IV)Y(1,I)return r;
- #define Y(n,R)for(;v>=n;v-=n)strcat(r,#R);
- char r[99];char*f(int v){*r=0;L}
- [Try it online!][TIO-m99kqi3b]
- [C (gcc)]: https://gcc.gnu.org/
- [TIO-m99kqi3b]: https://tio.run/##XZIxj8IgGIb3/goSFzD0bBM1bbi64EKCi0ODudzQ0FZJPGpo7WL869eDmgvcsXwvz/MB34CMz1JOC6Xl9V434L0fatW9XXZRiIzSZ8umRd20SjeAgxNMkyTBB3SCua3UhY0Ne1vXDriQujB3YEHnBsxnjwWfNRbOYubKBpfOYeZKihkyzXA3GhgS/T57ghofUdsZSMZdockYFxrZ6WQ1QIMXR0QieakMMB95/klcXLZQ6QGM6LE0RUL4c3Lbr0ppAMdO1Sh6RADc7kMPW5giRIBdqxVgnmaelowFIg/aRXBL8uIWB3S99pSz0ovtdjsbK/aUizJ8OUm8ojQQWRYKLoT4N5o/SQ8BznOPBf079euIVYfoOX3L9lqd@ym236GQaTbFt6au9KBk3BjTmf4H "C (gcc) – Try It Online"
- This function abuses static initialization so it can only be called once. By adding `*r=0;`, we can call it multiple times during testing, which is why the code in the TIO link below looks slightly longer.
- ---
- It can be minimized a bit further with non-compliant gcc tricks.
#2: Post edited
by
Lundin
·
2020-12-14T15:12:38Z (over 4 years ago)
Save 1 space by moving return inside the x macro list
# C (compliant), 198 bytes.- Golfed version of the function in the question, using X macros:
- ```c
#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,IV)Y(1,I)- #define Y(n,R)for(;v>=n;v-=n)strcat(r,#R);
char r[99];char*f(int v){L return r;}- ```
- This function abuses static initialization so it can only be called once. By adding `*r=0;`, we can call it multiple times during testing, which is why the code in the TIO link below looks slightly longer.
<a href="https://tio.run/##XZKxbsMgEIZ3PwVSFohwg6U0skWdhSxIzpLBIqo6WNhOkFIcYcdLlFevC04raFnu1/cd3A3I@CTltFBaXm51A976oVbdy3kbhcgofbJsWtRNq3QDCnCECSEE79ERZrYyF15t2Nm6dsCFxIW5Aws2N@Bi9lgUs8bCWcxdecWlc5i7kmCOwM@JfqceocYH1HYG0nGbazrGuUZ2OVkN0ODFAdFInisDzHuWfVAXly1UegAjui9NTmgBTDPcjAaGPiYnPiulARw7VaPoHgFwvQ09bGGCEHWTVyvAPU09LTkPRBa0i@AV8uQWB3S99rTgpRebzWY2VuxYIcpwMiFeMRaINA1FIYT4t5q/yfYBzjKPBfu79fOKVfvoMX3J9lKd@im2/yKXSTrF16au9KBk3BjTmf4b" title="C (gcc) – Try It Online">Try it online!</a>- ---
- It can be minimized a bit further with non-compliant gcc tricks.
- # C (compliant), 197 <strike>198</strike> bytes.
- Golfed version of the function in the question, using X macros:
- ```c
- #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,IV)Y(1,I)return r;
- #define Y(n,R)for(;v>=n;v-=n)strcat(r,#R);
- char r[99];char*f(int v){L}
- ```
- This function abuses static initialization so it can only be called once. By adding `*r=0;`, we can call it multiple times during testing, which is why the code in the TIO link below looks slightly longer.
- <a href="https://tio.run/##XZJBb4MgFMfvfgqSXqDBFZOu0Th7oRcSeunB0Cw7GNSWpMMGrZemX30O7BbYuLy/v9/D9w7I@CTltFBaXm51A976oVbdy3kbhcgofbJsWtRNq3QDODjChBCC9@gIM1upC6827GxdO@BC4sLcgQWdGzCfPRZ81lg4i5krr7h0DjNXEsyQaYab0cDk4OdEv@OPUOMDajsD83Fb6HyMC43slrIaoMGLA8ojea4MMO9Z9pG7uGyh0gMY0X1pCpLzx@Q@PyulARw7VaPoHgFwvQ09bGGC0DxztQLM09TTkrFAZEG7CP5CntzigK7XnnJWerHZbGZjxY5yUYaTCfGK0kCkaSi4EOLfav4m3Qc4yzwW9O/WzytW7aPH9CXbS3Xqp9g@i0Im6RRfm7rSg5JxY0xn@m8" title="C (gcc) – Try It Online">Try it online!</a>
- ---
- It can be minimized a bit further with non-compliant gcc tricks.
#1: Initial revision
by
Lundin
·
2020-12-14T12:04:34Z (over 4 years ago)
# C (compliant), 198 bytes.
Golfed version of the function in the question, using X macros:
```c
#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,IV)Y(1,I)
#define Y(n,R)for(;v>=n;v-=n)strcat(r,#R);
char r[99];char*f(int v){L return r;}
```
This function abuses static initialization so it can only be called once. By adding `*r=0;`, we can call it multiple times during testing, which is why the code in the TIO link below looks slightly longer.
<a href="https://tio.run/##XZKxbsMgEIZ3PwVSFohwg6U0skWdhSxIzpLBIqo6WNhOkFIcYcdLlFevC04raFnu1/cd3A3I@CTltFBaXm51A976oVbdy3kbhcgofbJsWtRNq3QDCnCECSEE79ERZrYyF15t2Nm6dsCFxIW5Aws2N@Bi9lgUs8bCWcxdecWlc5i7kmCOwM@JfqceocYH1HYG0nGbazrGuUZ2OVkN0ODFAdFInisDzHuWfVAXly1UegAjui9NTmgBTDPcjAaGPiYnPiulARw7VaPoHgFwvQ09bGGCEHWTVyvAPU09LTkPRBa0i@AV8uQWB3S99rTgpRebzWY2VuxYIcpwMiFeMRaINA1FIYT4t5q/yfYBzjKPBfu79fOKVfvoMX3J9lKd@im2/yKXSTrF16au9KBk3BjTmf4b" title="C (gcc) – Try It Online">Try it online!</a>
---
It can be minimized a bit further with non-compliant gcc tricks.