返回字符t在字符串s中最右边出现的位置,若s中不包括t,则返回-1
#include
//返回字符t在字符串s中最右边出现的位置,若s中不包括t,则返回-1
int strrindex( char s[], char t )
{
int i;
int count = -1;
for(i=0; s[i] != '\0'; i++)
{
if(s[i] == t)
{
count = i;
}
}
return count;
}
typedef struct TEST
{
char *data;
char testchar;
int expected;
} TEST;
int main(void)
{
TEST test[] =
{
{"Hello world", 'o', 7},
{"This string is littered with iiiis", 'i', 32},
{"No 'see' letters in here", 'c', -1}
};
size_t numtests = sizeof test / sizeof test[0];
size_t i;
char ch = 'o';
int pos;
for(i = 0; i < numtests; i++)
{
pos = strrindex(test[i].data, test[i].testchar);
printf("Searching %s for last occurrence of %c.\n",
test[i].data,
test[i].testchar);
printf("Expected result: %d\n", test[i].expected);
printf("%sorrect (%d).\n", pos == test[i].expected ? "C" : "Inc", pos);
if(pos != -1)
{
printf("Character found was %c\n", test[i].data[pos]);
}
}
return 0;
}
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