Compilare: user.cpp: In function ‘void update(char*, int)’: user.cpp:20:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (i<strlen(s)) {lit=s[i]-'a'; ^ user.cpp: In function ‘void caut(char*)’: user.cpp:33:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (i<strlen(s)) {lit=s[i]-'a'; ^ user.cpp: In function ‘int ma(char*)’: user.cpp:45:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (i<strlen(s)) {lit=s[i]-'a'; ^ user.cpp: In function ‘int main()’: user.cpp:62:35: warning: format ‘%s’ expects argument of type ‘char*’, but argument 3 has type ‘char (*)[25]’ [-Wformat=] fscanf(f,"%s",&s); ^ user.cpp:63:29: warning: NULL used in arithmetic [-Wpointer-arith] if (s[0]==NULL) {ok=false;break;} ^ user.cpp:57:6: warning: unused variable ‘i’ [-Wunused-variable] {int i,j,op,lit; ^ user.cpp:57:8: warning: unused variable ‘j’ [-Wunused-variable] {int i,j,op,lit; ^ user.cpp:57:13: warning: unused variable ‘lit’ [-Wunused-variable] {int i,j,op,lit; ^ user.cpp:60:37: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] while (ok==true) {fscanf(f,"%d",&op); ^ user.cpp:62:36: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%s",&s); ^