Compilare: main.cpp: In function 'int main()': main.cpp:18:116: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("strmatch.in","r",stdin),freopen("strmatch.out","w",stdout),scanf("%s\n%s",s,u),m=strlen(s),n=strlen(u); ^ main.cpp:18:116: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] main.cpp:18:116: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]