Compilare: main.cpp: In function 'int prim(int, int)': main.cpp:8:9: warning: unused variable 'r' [-Wunused-variable] 8 | int r; | ^ main.cpp: In function 'int main()': main.cpp:27:13: warning: this 'if' clause does not guard... [-Wmisleading-indentation] 27 | if(prim(i,j)==1) | ^~ main.cpp:29:21: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if' 29 | j++; | ^