Compilare: user.cpp: In function ‘int task1(int, int*, int)’: user.cpp:30:14: warning: unused variable ‘r’ [-Wunused-variable] int ls, ld, r = -1, m; ^ user.cpp: In function ‘int task2(int, int*, int)’: user.cpp:49:14: warning: unused variable ‘r’ [-Wunused-variable] int ls, ld, r = -1, m; ^ user.cpp: In function ‘int main()’: user.cpp:68:20: warning: unused variable ‘ok’ [-Wunused-variable] int m, n, a[c], i, ok=0, ls, ld, r, nr, x; ^ user.cpp:68:26: warning: unused variable ‘ls’ [-Wunused-variable] int m, n, a[c], i, ok=0, ls, ld, r, nr, x; ^ user.cpp:68:30: warning: unused variable ‘ld’ [-Wunused-variable] int m, n, a[c], i, ok=0, ls, ld, r, nr, x; ^ user.cpp:68:34: warning: unused variable ‘r’ [-Wunused-variable] int m, n, a[c], i, ok=0, ls, ld, r, nr, x; ^ user.cpp: In function ‘int task1(int, int*, int)’: user.cpp:44:9: warning: ‘m’ may be used uninitialized in this function [-Wmaybe-uninitialized] return m ; ^ user.cpp: In function ‘int task2(int, int*, int)’: user.cpp:62:13: warning: ‘m’ may be used uninitialized in this function [-Wmaybe-uninitialized] return m + 1; ^ user.cpp: In function ‘int main()’: user.cpp:62:13: warning: ‘m’ may be used uninitialized in this function [-Wmaybe-uninitialized] user.cpp:49:22: note: ‘m’ was declared here int ls, ld, r = -1, m; ^