Compilare: user.cpp: In function ‘int main()’: user.cpp:65:18: warning: format ‘%s’ expects argument of type ‘char*’, but argument 3 has type ‘char (*)[150]’ [-Wformat=] fscanf(f,"%s",&s1);n1=strlen(s1); ^ user.cpp:66:18: warning: format ‘%s’ expects argument of type ‘char*’, but argument 3 has type ‘char (*)[150]’ [-Wformat=] fscanf(f,"%s",&s2);n2=strlen(s2); ^ user.cpp:80:17: warning: format ‘%s’ expects argument of type ‘char*’, but argument 3 has type ‘char (*)[200]’ [-Wformat=] fscanf(f,"%s",&o); ^ user.cpp:65:19: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%s",&s1);n1=strlen(s1); ^ user.cpp:66:19: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%s",&s2);n2=strlen(s2); ^ user.cpp:74:18: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&m); ^ user.cpp:80:18: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%s",&o); ^