Eroare de compilare: main.cpp: In function 'int main()': main.cpp:33:66: error: 'sqrt' was not declared in this scope dr=mat[v[l].x][v[l].y]+(int)sqrt((double)diff); ^ main.cpp:44:67: error: 'sqrt' was not declared in this scope dr=(int)sqrt((double)(int)v[l].r*v[l].r-dist2d)+mat[v[l].x][v[l].y]; ^ main.cpp:37:25: warning: unused variable 'diff' [-Wunused-variable] int diff=(int)v[l].r*v[l].r-dist2d-(mat[v[l].x][v[l].y]-mat[i][j])*(mat[v[l].x][v[l].y]-mat[i][j]); ^~~~ main.cpp:11:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] { freopen("radio.in", "r" , stdin); ^ main.cpp:12:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("radio.out", "w", stdout); ^ main.cpp:14:32: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &m, &n, &k); ^ main.cpp:17:36: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &mat[i][j]); ^ main.cpp:19:52: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%lf", &v[i].x, &v[i].y, &v[i].r); ^ Non zero exit status: 1