C语言 遍历字符数组并打印字符
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Iterate through char array and print chars
提问by ojhawkins
I am trying to print each char in a variable.
我正在尝试打印变量中的每个字符。
I can print the ANSI char number by changing to this printf("Value: %d\n", d[i]);but am failing to actually print the string character itself.
我可以通过更改为这个来打印 ANSI 字符号,printf("Value: %d\n", d[i]);但实际上无法打印字符串字符本身。
What I am doing wrong here?
我在这里做错了什么?
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
int main(int argc, char *argv[])
{
int len = strlen(argv[1]);
char *d = malloc (strlen(argv[1])+1);
strcpy(d,argv[1]);
int i;
for(i=0;i<len;i++){
printf("Value: %s\n", (char)d[i]);
}
return 0;
}
回答by mvp
You should use %cformat to print characters in C. You are using %s, which requires to use pointer to the string, but in your case you are providing integer instead of pointer.
您应该使用%cformat 在 C 中打印字符。您正在使用%s,这需要使用指向字符串的指针,但在您的情况下,您提供的是整数而不是指针。
回答by Tay Wee Wen
The below will work. You pass in the pointer to a string when using the token %s in printf.
下面将工作。在 printf 中使用标记 %s 时,您传递指向字符串的指针。
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
int main(int argc, char *argv[])
{
int len = strlen(argv[1]);
char *d = malloc (strlen(argv[1])+1);
strcpy(d,argv[1]);
printf("Value: %s\n", d);
return 0;
}

