Compilare: user.cpp: In function ‘int main()’: user.cpp:35:16: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if (c==')') ^ user.cpp:48:16: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if (c==']') ^ user.cpp:21:22: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&t); ^ user.cpp:29:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%c",&c); ^