Question

伙计们，我需要编程新手的帮助，并且if-else语句遇到问题

我尝试删除每个包含else / else if的“段落”，但仅适用于if“ paragraph”（显然，因为其他段落不存在）

浮点w，l，r，pi，rec，tri，cir; 字符形状；

printf("What shape is the desired calculated area?\n");
scanf("%c",&shape);

    if(shape=='R')
    printf("width: ");
    scanf("%f",&w);
    printf("length: ");
    scanf("%f",&l);
    rec=w*l;
    printf("\nThe area for the rectangle is %.2f Cm2\n",rec);

    else if(shape=='C')
    printf("radius: ");
    scanf("%f",&r);
    pi=3.142;
    cir=pi*r*r;
    printf("\nThe area for the rectangle is %.2f Cm2\n",cir);

    else if(shape=='T')
    printf("width: ");
    scanf("%f",&w);
    printf("length: ");
    scanf("%f",&l);
    tri=1/2*w*l;
    printf("\nThe area for the rectangle is %.2f Cm2\n",tri);

    else
    printf("You must choose one type of shape using R C T only and only digits are allowed afterwards");

我收到一条消息，提示“ else”之前每行包含else单词的行都解析为[Error]解析错误。进一步阅读错误消息后会显示错误：“ else”，而之前没有“ if”。任何帮助将不胜感激

Answer 1

如果您使用“ if”时一行超过一个，则使用{} 喜欢

if(shape=='R'){
    printf("width: ");
    scanf("%f",&w);
    printf("length: ");
    scanf("%f",&l);
    rec=w*l;
    printf("\nThe area for the rectangle is %.2f Cm2\n",rec);
}

if(shape=='R')
printf("width: ");
scanf("%f",&w);
printf("length: ");
scanf("%f",&l);
rec=w*l;
printf("\nThe area for the rectangle is %.2f Cm2\n",rec);

会像下面的编译器中一样

if(shape=='R'){
    printf("width: ");
}
scanf("%f",&w);
printf("length: ");
scanf("%f",&l);
rec=w*l;
printf("\nThe area for the rectangle is %.2f Cm2\n",rec);

如果还有C

1 个答案: