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pointless macro letting you change number of characters read by scanf depending on the N value #475

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pointless macro letting you change number of characters read by scanf depending on the N value #475

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5 changes: 5 additions & 0 deletions CONTRIBUTORS.md
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Original file line number Diff line number Diff line change
Expand Up @@ -491,3 +491,8 @@ Name: [antoooks](https://github.com/antoooks) </br>
Place: Indonesia / Singapore </br>
Coding Experience: JS, TS, PHP, Java, Go. Specialize in CI/CD, Cloud Architecture, and Automation.
Email: [email protected] </br>

Name: [shaxi1](https://github.com/shaxi1) </br>
Place: Poland </br>
Coding Experience: C, Cpp, Python, JS </br>

17 changes: 17 additions & 0 deletions c/shaxi1_macro.c
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@@ -0,0 +1,17 @@
#include <stdio.h>
// number of wanted characters in string
#define N 100
#define str(s) #s
#define xstr(s) str(s)

int main() {char arr[N+1];printf("Type something\n> ");scanf("%"xstr(N)"[^\n]", arr);printf("%s\n", arr);return 0;}

/* gcc -E macro.c | how macro looks "pasted" into code
int main() {
char arr[100 +1];
printf("Type something\n> ");
scanf("%""100""[^\n]", arr);
printf("%s\n", arr);
return 0;
}
*/