Compilare: user.c: In function ‘main’: user.c:33:16: warning: unused variable ‘sir’ [-Wunused-variable] char c,sir[1000001]; ^ user.c:32:25: warning: unused variable ‘j’ [-Wunused-variable] int m,n,i,parse,j,k; ^ user.c: In function ‘pop’: user.c:26:5: warning: control reaches end of non-void function [-Wreturn-type] } //sf pop_back ^ user.c: In function ‘main’: user.c:41:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d",&n,&k); ^ user.c:44:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%c",&c); ^ user.c:45:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%c",&c); ^ user.c:53:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%c",&c); ^