程序代码：

#include<stdio.h>
void delcharfun(char str[],char ch)
{
    int i,tp=0;
    for(i=0;str[i];i++)
        if(str[i]!=ch)
            str[tp++]=str[i];
        str[tp]='\0';

}
int main()
{
    char str[110],ch;
    printf("Please input the string:");
    scanf("%s",str);
    fflush(stdin);    
    printf("Please input the letter you want to delete:");
    scanf("%c",&ch);
    delcharfun(str,ch);
    printf("The result is:");
    printf("%s\n",str);    
    return 0;
}