程序代码：

#include <stdio.h>

int main()
{
    char a[30][2]={ 0 },i;
    int x,count=0;

    scanf("%d",&x);
    scanf("%c",&i);    //获取换行
    while(x--)
    {
        gets(a[x]);    
        if(a[x][0]!=a[x+1][0])
            count++;
    }
    scanf("%c",&i);//获取换行
    printf("%d",count+1);
    return 0;
}

[此贴子已经被作者于2019-8-18 12:29编辑过]

程序代码：

#include <stdio.h>

int main( void )
{
    unsigned count = 0;

    unsigned n;
    scanf( "%u", &n );
    char last = 0;
    for( unsigned i=0; i!=n; ++i )
    {
        char cur;
        scanf( " %c", &cur );
        if( cur != last )
        {
            ++count;
            last = cur;
        }
    }

    printf( "%u\n", count+1 );
}