Compilare: main.cpp: In function 'int main()': main.cpp:50:19: warning: unused variable 'c' [-Wunused-variable] 50 | int n,i,x,a,b,c; | ^ main.cpp: In function 'int calcul(int, int, char)': main.cpp:30:1: warning: control reaches end of non-void function [-Wreturn-type] 30 | } | ^