foo.c: In function 'main':
foo.c:11:2: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
11 | if(j<i)
| ^~
foo.c:12:7: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
12 | r=j;j=i;i=r;
| ^
foo.c:5:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
5 | scanf("%d%d\n",&b1,&a1);
| ^~~~~~~~~~~~~~~~~~~~~~~
foo.c:6:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
6 | scanf("%d%d\n",&b2,&a2);
| ^~~~~~~~~~~~~~~~~~~~~~~
foo.c:4:22: warning: 'r' may be used uninitialized in this function [-Wmaybe-uninitialized]
4 | int a1,a2,b1,b2,m,n,r,j,i;
| ^
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