Compilare: main.cpp: In function 'int main()': main.cpp:33:22: warning: unused variable 'ma' [-Wunused-variable] int p, n, i, j, s, ma, x, l, c, ll, cc; ^~ main.cpp:33:26: warning: unused variable 'x' [-Wunused-variable] int p, n, i, j, s, ma, x, l, c, ll, cc; ^ main.cpp:33:29: warning: unused variable 'l' [-Wunused-variable] int p, n, i, j, s, ma, x, l, c, ll, cc; ^ main.cpp:33:32: warning: unused variable 'c' [-Wunused-variable] int p, n, i, j, s, ma, x, l, c, ll, cc; ^ main.cpp:33:35: warning: unused variable 'll' [-Wunused-variable] int p, n, i, j, s, ma, x, l, c, ll, cc; ^~ main.cpp:33:39: warning: unused variable 'cc' [-Wunused-variable] int p, n, i, j, s, ma, x, l, c, ll, cc; ^~ main.cpp:36:28: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d",&p,&n); ^ main.cpp:39:33: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d",&a[i][j]); ^