Compilare: user.cpp: In function ‘void back(int, int, int)’: user.cpp:22:26: warning: array subscript has type ‘char’ [-Wchar-subscripts] s[k]=s[k-1]+p[k][x[k]]; ^ user.cpp:31:32: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(v[z[m][r][0]][z[m][r][1]]) ^ user.cpp:31:44: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(v[z[m][r][0]][z[m][r][1]]) ^ user.cpp: In function ‘int main()’: user.cpp:45:47: warning: format ‘%d’ expects argument of type ‘int*’, but argument 2 has type ‘char*’ [-Wformat=] for(j=1;j<=b;j++) scanf("%d ",&v[i][j]); ^ user.cpp:52:56: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(v[l][c]) nr[n]++, z[n][nr[n]][0]=l, z[n][nr[n]][1]=c; ^ user.cpp:52:74: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(v[l][c]) nr[n]++, z[n][nr[n]][0]=l, z[n][nr[n]][1]=c; ^ user.cpp:61:24: warning: format ‘%ld’ expects argument of type ‘long int’, but argument 2 has type ‘int’ [-Wformat=] printf("%ld\n",smin); ^ user.cpp:42:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("suma3.in","r",stdin); freopen("suma3.out","w",stdout); ^ user.cpp:42:67: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("suma3.in","r",stdin); freopen("suma3.out","w",stdout); ^ user.cpp:43:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d\n",&a,&b); ^ user.cpp:45:48: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for(j=1;j<=b;j++) scanf("%d ",&v[i][j]); ^