Compilare: main.cpp: In function 'int main()': main.cpp:16:15: warning: unused variable 'lc' [-Wunused-variable] int n, m, lc, cc, i, st, dr, l, pix, piy, pfx, pfy, col, lin, j, min, linn, coll,x, ok; ^~ main.cpp:16:19: warning: unused variable 'cc' [-Wunused-variable] int n, m, lc, cc, i, st, dr, l, pix, piy, pfx, pfy, col, lin, j, min, linn, coll,x, ok; ^~ main.cpp:16:34: warning: unused variable 'l' [-Wunused-variable] int n, m, lc, cc, i, st, dr, l, pix, piy, pfx, pfy, col, lin, j, min, linn, coll,x, ok; ^ main.cpp:16:57: warning: unused variable 'col' [-Wunused-variable] int n, m, lc, cc, i, st, dr, l, pix, piy, pfx, pfy, col, lin, j, min, linn, coll,x, ok; ^~~ main.cpp:16:62: warning: unused variable 'lin' [-Wunused-variable] int n, m, lc, cc, i, st, dr, l, pix, piy, pfx, pfy, col, lin, j, min, linn, coll,x, ok; ^~~ main.cpp:16:86: warning: unused variable 'x' [-Wunused-variable] int n, m, lc, cc, i, st, dr, l, pix, piy, pfx, pfy, col, lin, j, min, linn, coll,x, ok; ^ main.cpp:21:34: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d %d", &n, &m); ^ main.cpp:22:27: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%c", &c); ^ main.cpp:26:43: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%c", &c); ^ main.cpp:45:35: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%c", &c); ^ main.cpp:64:16: warning: 'pfy' may be used uninitialized in this function [-Wmaybe-uninitialized] b[pfy][pfx]=1; ~~~~~~~~~~~^~ main.cpp:64:16: warning: 'pfx' may be used uninitialized in this function [-Wmaybe-uninitialized] main.cpp:79:16: warning: 'piy' may be used uninitialized in this function [-Wmaybe-uninitialized] a[piy][pix]=1; ~~~~~~~~~~~^~ main.cpp:79:16: warning: 'pix' may be used uninitialized in this function [-Wmaybe-uninitialized]