无效的指针添加

本文介绍了无效的指针添加的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述 我想要打印学生的结果。 im使用结构...所有变量都是在结构中定义的，而我添加了5个主题的标记然后它给了我像无效指针添加的错误，相反，我使用了多个结构变量。 我的代码是 i want to print result of a student .i m using structure for it.. all the variables are defined in structure while i adding marks of 5 subject then it gives me error like invalid pointer addtion, rather i'd usd more than one structure varibale. my code is struct result{ char enroll[100]; int m1[20],m2[20],m3[20],m4[20],m5[20]; int t[100]; int per[100];};void result(){ struct result r,r1,r2,r3,r4,r5; struct record s; FILE *fp; clrscr(); fp=fopen("stud.txt","wb"); printf("Enter Enrollment No : "); gets(r.enroll); if(strcmp(r.enroll,s.enroll_no)==0) { printf("Enter Marks for 5 subject:"); scanf("%d %d %d %d %d",r1.m1,r2.m2,r3.m3,r4.m4,r5.m5); r.t=r1.m1+r1.m2+r1.m3+r1.m4+r1.m5; r1.per=r.t/5; } else { printf("Record Does Not Exist :"); printf("Press Any Key to Exit "); exit(0); }printf("per=%d",r1.per);printf("total=%d",r.t);getch();} 推荐答案 scanf("%s %s %s %s %s",r1.m1,r2.m2,r3.m3,r4.m4,r5.m5); 对于每个字符串，一个不同结构的自己的成员？ 为什么不： b $ b For eacht string a own member of a different struct?Why not:scanf("%s %s %s %s %s",r1.m1,r1.m2,r.m3,r1.m4,r1.m5); 你最好使用比m1更多的描述名称。喜欢名称或描述... and you better use more describale names than m1. Like name or description... #include <stdio.h>#define N 5struct result{ int enroll; int m[N]; int t; double per;};int main(){ struct result r; printf("Enter Marks for 5 subjects: "); if ( scanf("%d %d %d %d %d",&r.m[0],&r.m[1],&r.m[2],&r.m[3],&r.m[4]) == N) { int n; r.t = 0; for ( n=0; n<N; ++n) r.t += r.m[n]; r.per = (double)r.t / N; printf("r.t = %d, r.per = %g\n", r.t, r.per); } else {// handle user input error } return 0;} 这篇关于无效的指针添加的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！