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View Compilation Error

0_0_19850734_10431.c: In function 'main':
0_0_19850734_10431.c:4:1: error: 'intn' undeclared (first use in this function)
 intn,i,j;
 ^
0_0_19850734_10431.c:4:1: note: each undeclared identifier is reported only once for each function it appears in
0_0_19850734_10431.c:4:6: error: 'i' undeclared (first use in this function)
 intn,i,j;
      ^
0_0_19850734_10431.c:4:8: error: 'j' undeclared (first use in this function)
 intn,i,j;
        ^
0_0_19850734_10431.c:5:1: error: 'doublea' undeclared (first use in this function)
 doublea[100];
 ^
0_0_19850734_10431.c:6:1: error: 'doublel' undeclared (first use in this function)
 doublel,sum,ad;
 ^
0_0_19850734_10431.c:6:9: error: 'sum' undeclared (first use in this function)
 doublel,sum,ad;
         ^
0_0_19850734_10431.c:6:13: error: 'ad' undeclared (first use in this function)
 doublel,sum,ad;
             ^
0_0_19850734_10431.c:7:19: error: 'n' undeclared (first use in this function)
 while(scanf("%d",&n)!=EOF)
                   ^
0_0_19850734_10431.c:11:14: error: 'a' undeclared (first use in this function)
 scanf("%lf",&a[i]);
              ^
0_0_19850734_10431.c:16:2: error: 'l' undeclared (first use in this function)
 {l=a[i];a[i]=a[j];a[j]=l;}
  ^


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