Compilare: user.cpp: In function ‘int main()’: user.cpp:14:62: warning: format ‘%s’ expects argument of type ‘char*’, but argument 5 has type ‘char (*)[256]’ [-Wformat=] for (i=1;i<=k;i++) {fscanf(f,"%d %d %s",&lin[i],&col[i],&s[i]); ^ user.cpp:17:52: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0;j<strlen(s[i]);j++) a=a*10+s[i][j]-48; ^ user.cpp:23:43: warning: NULL used in arithmetic [-Wpointer-arith] while (p[0]!=NULL) {if (not(p[0]==':'||p[1]==':'||p[2]==':')) ^ user.cpp:12:16: warning: unused variable ‘r’ [-Wunused-variable] {int n,k,i,j,e,r; ^