Compilare: main.cpp: In function 'int main()': main.cpp:42:29: warning: narrowing conversion of 'i' from 'int' to 'unsigned char' inside { } [-Wnarrowing] s[0][++nr]={i, j}; ^ main.cpp:42:29: warning: narrowing conversion of 'j' from 'int' to 'unsigned char' inside { } [-Wnarrowing] main.cpp:45:33: warning: narrowing conversion of 'j' from 'int' to 'unsigned char' inside { } [-Wnarrowing] s[0][++nr]={j, n-i+1}; ^ main.cpp:45:31: warning: narrowing conversion of '((n - i) + 1)' from 'int' to 'unsigned char' inside { } [-Wnarrowing] s[0][++nr]={j, n-i+1}; ~~~^~ main.cpp:48:28: warning: narrowing conversion of '((n - i) + 1)' from 'int' to 'unsigned char' inside { } [-Wnarrowing] s[0][++nr]={n-i+1, j}; ~~~^~ main.cpp:48:33: warning: narrowing conversion of 'j' from 'int' to 'unsigned char' inside { } [-Wnarrowing] s[0][++nr]={n-i+1, j}; ^ main.cpp:51:29: warning: narrowing conversion of 'j' from 'int' to 'unsigned char' inside { } [-Wnarrowing] s[0][++nr]={j, i}; ^ main.cpp:51:29: warning: narrowing conversion of 'i' from 'int' to 'unsigned char' inside { } [-Wnarrowing] main.cpp:61:60: warning: narrowing conversion of 'i' from 'int' to 'unsigned char' inside { } [-Wnarrowing] vec[++val]={s[(i+1)%2][j].x, s[(i+1)%2][j].y, i}; ^