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View Compilation Error

0_0_23957442_16871.c: In function 'main':
0_0_23957442_16871.c:12:3: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
   for(int i=0;i<n2;i++)  
   ^
0_0_23957442_16871.c:12:3: note: use option -std=c99, -std=gnu99, -std=c11 or -std=gnu11 to compile your code
0_0_23957442_16871.c:15:11: error: redefinition of 'i'
   for(int i=0;i<n2;i++)
           ^
0_0_23957442_16871.c:12:11: note: previous definition of 'i' was here
   for(int i=0;i<n2;i++)  
           ^
0_0_23957442_16871.c:15:3: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
   for(int i=0;i<n2;i++)
   ^
0_0_23957442_16871.c:16:4: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
    for(int j=0;j<n2-1;j++)
    ^
0_0_23957442_16871.c:29:11: error: redefinition of 'i'
   for(int i=0;i<n2;i++)
           ^
0_0_23957442_16871.c:15:11: note: previous definition of 'i' was here
   for(int i=0;i<n2;i++)
           ^
0_0_23957442_16871.c:29:3: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
   for(int i=0;i<n2;i++)
   ^
0_0_23957442_16871.c:31:4: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
    for (int i1=0;i1<b[i] ;i1++ )
    ^
0_0_23957442_16871.c:34:5: error: 'for' loop initial declarations are only allowed in C99 or C11 mode
     for (int j=0;j<a[i]-2 ; j++)
     ^


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