Compilare: main.cpp: In function 'void save()': main.cpp:22:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<strlen(st[i]);j++){ ~^~~~~~~~~~~~~~ main.cpp:29:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<strlen(temp) and temp[i]!=')';i++){ ~^~~~~~~~~~~~~ main.cpp: In function 'void cpy()': main.cpp:35:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<strlen(temp) and temp[i]!=')';i++){ ~^~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:50:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<strlen(prop);){ ~^~~~~~~~~~~~~