Compilare: main.cpp: In function 'void mem(int)': main.cpp:40:9: warning: unused variable 'i' [-Wunused-variable] int i; ^ main.cpp: In function 'void cit()': main.cpp:17:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&s,&n); ^ main.cpp:20:33: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&a[i][j]); ^