Compilare: user.cpp: In function ‘int main()’: user.cpp:67:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &teste); ^ user.cpp:72:50: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d%d", &nrlin, &nrcol, &k); ^ user.cpp:80:44: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &m[i][j]); ^ user.cpp:39:14: warning: ‘last’ may be used uninitialized in this function [-Wmaybe-uninitialized] while(t[x]!=x){ ^ user.cpp:63:53: note: ‘last’ was declared here int nrlin, nrcol, k, teste, ans, i, j, r, u, p, last, x; ^