/in/foo.cc: In function 'int main()':
/in/foo.cc:9:14: error: invalid operands of types 'const char [3]' and 'float' to binary 'operator%'
   printf("%f"%x*0.95);
          ~~~~^~
/in/foo.cc:13:15: error: invalid operands of types 'const char [3]' and 'float' to binary 'operator%'
    printf("%f"%x*0.9);
           ~~~~^~
/in/foo.cc:17:15: error: invalid operands of types 'const char [3]' and 'float' to binary 'operator%'
    printf("%f"%x*0.85);
           ~~~~^~
/in/foo.cc:21:15: error: invalid operands of types 'const char [3]' and 'float' to binary 'operator%'
    printf("%f"%x*0.8);
           ~~~~^~