Compilare: main.cpp: In function 'int main()': main.cpp:8:26: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d", &n ); ^ main.cpp:9:26: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d", &a ); ^ main.cpp:13:30: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d", &b ); ^ main.cpp:23:13: warning: 'st' may be used uninitialized in this function [-Wmaybe-uninitialized] x = st + 1; ~~^~~~~~~~