摘要： #include <stdio.h> int main() { FILE *fp; fp = fopen("data4.txt","r"); char ch; int count = 0; do { ch = fgetc(fp); if(ch >= 33 && ch <= 126) count++; 阅读全文

摘要： #include <stdio.h> #include <string.h> #define N 3 typedef struct student { int id; char name[20]; char subject[20]; double perf; double mid; double f 阅读全文