帮我补个代码【程序设计】 --------------------------------------------------------- 题目：假设输入的是字母，若是大写字母输出1，小写字母输出0。 -------------------------------------------------------*/ #include <stdio.h> void bky(); int fun(char c) { /**********Begin**********/ /********** End **********/ } void main() { char c1; int c2; printf("Please input a char:\n"); c1=getchar(); c2=fun(c1); printf("%d\n",c2); bky(); } void bky() { FILE *IN,*OUT; int i; char iIN; int iOUT; IN=fopen("in.dat","r"); if(IN==NULL) { printf("Please Verify The Currernt Dir..it May Be Changed"); } OUT=fopen("out.dat","w"); if(OUT==NULL) { printf("Please Verify The Current Dir.. it May Be Changed"); } for(i=0;i<2;i++) { fscanf(IN,"%c",&iIN); iOUT=fun(iIN); fprintf(OUT,"%d\n",iOUT); } fclose(IN); fclose(OUT); }

你可以这样实现fun函数：

int fun(char c) {
    if(c >= 'A' && c <= 'Z') {
        return 1;
    }
    else {
        return 0;
    }
}

这里用到了ASCII码表中大写字母和小写字母的编码范围，如果c在大写字母的编码范围内，就返回1，否则返回0。

完整代码如下：

#include <stdio.h> 

int fun(char c) {
    if(c >= 'A' && c <= 'Z') {
        return 1;
    }
    else {
        return 0;
    }
}

void main() {
    char c1;
    int c2;
    printf("Please input a char:\n");
    c1=getchar();
    c2=fun(c1);
    printf("%d\n",c2);
    bky();
}

void bky() {
    FILE *IN,*OUT;
    int i;
    char iIN;
    int iOUT;
    IN=fopen("in.dat","r");
    if(IN==NULL) {
        printf("Please Verify The Currernt Dir..it May Be Changed");
    }
    OUT=fopen("out.dat","w");
    if(OUT==NULL) {
        printf("Please Verify The Current Dir.. it May Be Changed");
    }
    for(i=0;i<2;i++) {
        fscanf(IN,"%c",&iIN);
        iOUT=fun(iIN);
        fprintf(OUT,"%d\n",iOUT);
    }
    fclose(IN);
    fclose(OUT);
}