Compilare: user.cpp: In function ‘int main()’: user.cpp:197:50: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(max_arie_2 < v[mat[i][j+1]] + v[mat[i+1][j]] + v[mat[i][j-1]] + 1 ){ ^ user.cpp:197:67: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(max_arie_2 < v[mat[i][j+1]] + v[mat[i+1][j]] + v[mat[i][j-1]] + 1 ){ ^ user.cpp:197:84: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(max_arie_2 < v[mat[i][j+1]] + v[mat[i+1][j]] + v[mat[i][j-1]] + 1 ){ ^ user.cpp:202:56: warning: array subscript has type ‘char’ [-Wchar-subscripts] else if(max_arie_2 == v[mat[i][j+1]] + v[mat[i+1][j]] + v[mat[i][j-1]] + 1){ ^ user.cpp:202:73: warning: array subscript has type ‘char’ [-Wchar-subscripts] else if(max_arie_2 == v[mat[i][j+1]] + v[mat[i+1][j]] + v[mat[i][j-1]] + 1){ ^ user.cpp:202:90: warning: array subscript has type ‘char’ [-Wchar-subscripts] else if(max_arie_2 == v[mat[i][j+1]] + v[mat[i+1][j]] + v[mat[i][j-1]] + 1){ ^ user.cpp:49:10: warning: unused variable ‘c’ [-Wunused-variable] char c; ^ user.cpp:51:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d %d", &n, &m); ^ user.cpp:54:38: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%s", mat[i] + 1); ^