#include <stdio.h>
      int main()
      {
       int a = 3;
       int b = 7;
       int c = 13;

       printf("a=%d | b=%d |c=%d\n", a, b, c );
       b = c-a;
       printf("a=%d | b=%d |c=%d\n", a, b, c );
       // b est maintenant egal a 10 ( 13-3 )
       a = c-2;
       printf("a=%d | b=%d |c=%d\n", a, b, c );
       // a est maintenant egal a 8 ( 10-2 )
       c= 140-22;
       printf("a=%d | b=%d |c=%d\n", a, b, c );
       // c est maintenant egal a 118
       return(1);
      }