Compilare: main.cpp: In function 'bool vrf(int, int, int)': main.cpp:16:1: warning: no return statement in function returning non-void [-Wreturn-type] 16 | } | ^ main.cpp: In function 'int main()': main.cpp:22:18: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 22 | for(j=0;j<strlen(c);++j) a[i][j+1]=(c[j]-'0'); | ~^~~~~~~~~~