c语言fgets和scanf,scanf和fgets在同一个程序中

void menu() {

int op;

printf("n Choose a option from below : nn");

printf(" 1: Add Contactn"

" 2: View A Contactn"

" 3: View All Contactsn"

" 4: View All Contacts With a Common First Charactern"

" 5: Delete All Contactn"

" 6: Delete A Contactn"

" 7: Replace A Contact Namen"

" 8: Replace A Contact Numbern"

" 9: Refreshn"

" 10: Exitnn");

printf(" Which one ? ");

fgets(op, 5, stdin);

switch ((int)op) {

case 1: addrecords(); break;

case 2: viewone(); break;

case 3: viewall(); break;

case 4: viewonechar(); break;

case 5: deleteall(); break;

case 6: deleteone(); break;

case 7: replaceone(); break;

case 8: replaceonenumber(); break;

case 9: refresh(); break;

case 10: exit(0); break;

default:

printf ("n Wrong Option.nn");

menu();

break;

}

}

void addrecords() {

char name[50];

char number[20];

printf("nn Enter Contact Number (+880) : "); //Skips this

fgets(number, 20, stdin);

check(number);

printf(" Enter Contact Name : "); //Comes in here

fgets(name, 50, stdin);

fp = fopen("Phonebook.txt","a");

fprintf(fp, "%s %sn", name, number);

fclose(fp);

printf("n Contact Successfully Saved!n Returning To Main Menu...nn");

menu();

}

void check(char n[20]) {

char name[25];

char ncheck[20];

fp = fopen("Phonebook.txt", "r");

fscanf(fp, "%s %s", name, ncheck);

while (!feof(fp)) {

if ((strcmp(ncheck, n)) == 0) {

printf ("n Contact Already Exists.nn");

fclose(fp);

menu();

} else {

fscanf (fp, "%s %s", name, ncheck);

}

}

}

好吧我编辑了我的程序。我输入1后，程序说错了选项。但我正在写入一个。虽然我做得对，但为什么程序显示错误的选项？这是否与fgets？现在有什么问题？scanf和fgets在同一个程序中

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没有办法让scanf不留任何换行符吗？ –

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我的建议：不要使用'scanf'，而是用你需要写的函数替换它，比如'int GetInteger()'。使用''fgets''(http)替换'scanf('％d'，&op);'''GetInteger()'''GetInteger()'函数非常容易编写~3-4行代码。 ：//www.cplusplus.com/reference/cstdio/fgets/)和['atoi'](http://www.cplusplus.com/reference/cstdlib/atoi/) –

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请看[Why is“while( ！(feof(file))“总是错？](http://stackoverflow.com/q/5431941/2173917) –