foo.c: In function 'main':
foo.c:15:5: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d",&n);
     ^~~~~~~~~~~~~~
foo.c:20:9: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%s",ip[i].name);
         ^~~~~~~~~~~~~~~~~~~~~~
foo.c:21:9: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d",&ip[i].es);
         ^~~~~~~~~~~~~~~~~~~~~
foo.c:22:9: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d",&ip[i].js);
         ^~~~~~~~~~~~~~~~~~~~~
foo.c:24:9: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%c",&ip[i].cadre);
         ^~~~~~~~~~~~~~~~~~~~~~~~
foo.c:26:9: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%c",&ip[i].west);
         ^~~~~~~~~~~~~~~~~~~~~~~
foo.c:27:9: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d",&ip[i].paper);
         ^~~~~~~~~~~~~~~~~~~~~~~~
foo.c:31:9: warning: 'nmax' may be used uninitialized in this function [-Wmaybe-uninitialized]
     int nmax;
         ^~~~

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