#include<stdio.h>
#include<ctype.h>

#define  N  20

void capitalize(char a[],int N+1 );

int main()
{
    int i;
    char a[N] = "Asawdw1123,.";
    capitalize(a,10);
    for(i=0;i<(N+1);i++)
    {
        printf("%c",a[i]);
    }                                                                                            
    
    
}

void capitalize(char a[], int N+1)
{
    int i;
    
    for(i=0;i<(N+1);i++){
        a[i]=toupper(a[i]);
        
    }
}

报错了 哪不对呢