Compilare: main.cpp: In function 'bool And()': main.cpp:38:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 38 | while(j < s.size() && s[j]=='*') | ~~^~~~~~~~~~ main.cpp: In function 'bool expr()': main.cpp:48:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 48 | while(j < s.size() && s[j]=='+') | ~~^~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:62:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 62 | for(int j=0;j<s.size();j++) | ~^~~~~~~~~ main.cpp:71:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 71 | while(j < s.size() && isdigit(s[j])) | ~~^~~~~~~~~~ main.cpp:75:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 75 | if(j==s.size()) | ~^~~~~~~~~~ main.cpp:106:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 106 | for(int i=0;i<r.size()-1;i++) | ~^~~~~~~~~~~ main.cpp:88:27: warning: 'c' may be used uninitialized [-Wmaybe-uninitialized] 88 | for(int j=a;j<=b;j+=c) | ~^~~ main.cpp:61:17: note: 'c' was declared here 61 | int a,b,c; | ^ main.cpp:88:22: warning: 'b' may be used uninitialized [-Wmaybe-uninitialized] 88 | for(int j=a;j<=b;j+=c) | ~^~~ main.cpp:61:15: note: 'b' was declared here 61 | int a,b,c; | ^ main.cpp:88:27: warning: 'a' may be used uninitialized [-Wmaybe-uninitialized] 88 | for(int j=a;j<=b;j+=c) | ~^~~ main.cpp:61:13: note: 'a' was declared here 61 | int a,b,c; | ^