学生成绩管理系统设计(纯C语言,不能有C++,确保最简单最浅显)运行环境VC...答:{4009,"qfg","m",74,78,36},{4010,"gft","m",45,85,98},{4011,"mn","m",60,77,17},{4012,"yer","w",78,78,100},{4013,"lsd","m",100,89,85}},s;int M=13;void modify(struct student stu[]){ int t; long num; char z; t=search(stu)-400; printf("input num:"); sc...