Justification

Using one declaration on a line the code will become more readable and in the case of pointer declarations not result in unexpected behavior. Besides, to be able to determine the amount of software, a uniform way of declaring variables is required.

Example

int* i, j; /* WRONG: i is a pointer, j isn't */

long l; char c; /* WRONG */

int* m; /* RIGHT */
int  n; /* RIGHT */
int  i, j; /* RIGHT */