foo.cc: In function 'int main()':
foo.cc:39:23: warning: unknown conversion type character '\x0a' in format [-Wformat=]
39 | printf("%.2f\%\n", ret1);
| ^~
foo.cc:40:23: warning: unknown conversion type character '\x0a' in format [-Wformat=]
40 | printf("%.2f\%\n", ret2);
| ^~
foo.cc:41:23: warning: unknown conversion type character '\x0a' in format [-Wformat=]
41 | printf("%.2f\%\n", ret3);
| ^~
foo.cc:42:23: warning: unknown conversion type character '\x0a' in format [-Wformat=]
42 | printf("%.2f\%\n", ret4);
| ^~
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