Compilare: main.cpp: In function 'void expresie()': main.cpp:12:26: warning: suggest parentheses around '&&' within '||' [-Wparentheses] while (s[p]>='a' && s[p]<='z' || s[p] >= '0' && s[p] <= '9') ~~~~~~~~~~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:37:11: warning: unused variable 'n' [-Wunused-variable] int i,n; ^ main.cpp:38:32: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("dir.in","r",stdin); ^ main.cpp:39:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("dir.out","w",stdout); ^ main.cpp:40:24: warning: ignoring return value of 'char* fgets(char*, int, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fgets(s,2000,stdin); ^