Compilare: user.cpp: In function ‘int printMST(int*, int, int**)’: user.cpp:34:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:64:40: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(input,"%d %d",&nodes,&edges); ^ user.cpp:79:45: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(input,"%d %d %d",&x,&y,&cost); ^ user.cpp: In function ‘int minKey(int*, bool*, int)’: user.cpp:16:12: warning: ‘min_index’ may be used uninitialized in this function [-Wmaybe-uninitialized] return min_index; ^ user.cpp: In function ‘void primMST(int**, int)’: user.cpp:51:25: warning: ‘min_index’ may be used uninitialized in this function [-Wmaybe-uninitialized] mstSet[u] = true; ^