Compilare: main.cpp: In function 'void build()': main.cpp:16:18: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 16 | for(int i = 1; i<strlen(a); i++) | ~^~~~~~~~~~ main.cpp: In function 'void debug_t()': main.cpp:24:18: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 24 | for(int i = 0; i<strlen(a); i++) | ~^~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:41:16: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 41 | for(int i=0; i<strlen(b); i++) | ~^~~~~~~~~~ main.cpp:48:8: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare] 48 | if(j == strlen(a)) | ~~^~~~~~~~~~~~