Main.c: In function ‘main’:
Main.c:8:6: warning: unused variable ‘l’ [-Wunused-variable]
8 | int l = 0;
| ^
Main.c:5:12: warning: unused variable ‘k’ [-Wunused-variable]
5 | int i, j, k;
| ^
Main.c:5:9: warning: unused variable ‘j’ [-Wunused-variable]
5 | int i, j, k;
| ^
Main.c:5:6: warning: unused variable ‘i’ [-Wunused-variable]
5 | int i, j, k;
| ^
/usr/bin/ld: /tmp/ccudDpoO.o: in function `main':
Main.c:(.text.startup+0x36): undefined reference to `sz'
/usr/bin/ld: Main.c:(.text.startup+0x44): undefined reference to `sz'
/usr/bin/ld: Main.c:(.text.startup+0x4e): undefined reference to `sz'
collect2: error: ld returned 1 exit status