Compilare: main.cpp: In function 'void det()': main.cpp:14:12: warning: converting to non-pointer type 'char' from NULL [-Wconversion-null] s[n+1]=NULL; ^~~~ main.cpp:15:19: warning: NULL used in arithmetic [-Wpointer-arith] for(i=0;s[i]!=NULL;i++) ^~~~ main.cpp:23:19: warning: NULL used in arithmetic [-Wpointer-arith] for(i=0;s[i]!=NULL;i++) ^~~~ main.cpp:43:24: warning: this 'else' clause does not guard... [-Wmisleading-indentation] else ^~~~ main.cpp:45:25: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'else' sx1+=nr*semn1*semn2; ^~~ main.cpp:52:24: warning: this 'else' clause does not guard... [-Wmisleading-indentation] else ^~~~ main.cpp:54:25: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'else' s1+=nr*semn1*semn2; ^~