C语言百分制成绩转换为五级分制成绩

C语言百分制成绩转换为五级分制成绩#includestdio.hVoidmain(){floatx;printf(输入一个百分制成绩\n);scanf(%f,&x);if(x=100&&x=90)printf(grade:A\n);elseif(x=80)printf(grade:B\n);elseif(x=70)printf(grade:C\n);elseif(x=60)printf(grade:D\n);elseprintf(grade:E\n);}