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0_0_15059836_30692.cpp: In function 'int main()':
0_0_15059836_30692.cpp:14:15: error: 'signed' or 'unsigned' invalid for 'a'
  signed float a,b,c,d;
               ^
0_0_15059836_30692.cpp:14:17: error: 'signed' or 'unsigned' invalid for 'b'
  signed float a,b,c,d;
                 ^
0_0_15059836_30692.cpp:14:19: error: 'signed' or 'unsigned' invalid for 'c'
  signed float a,b,c,d;
                   ^
0_0_15059836_30692.cpp:14:21: error: 'signed' or 'unsigned' invalid for 'd'
  signed float a,b,c,d;
                     ^