这是我的函数:分割字符串以140字符块
char** split_string(char* message){
int i = 0;
int j = 0;
int numberOfMsgs = 0;
int charsInLastMsg = (int)(strlen(message)%140);
if((int)strlen(message) > 140*4){
return NULL;
}
if((int)(strlen(message)%140)){
numberOfMsgs = (int)(strlen(message)/140) + 1;
}
else{
numberOfMsgs = (int)(strlen(message)/140);
}
printf("message length = %d, we will have %d messages, and last msg will have %d characters\n", (int)strlen(message), numberOfMsgs, charsInLastMsg);
char **m = malloc(numberOfMsgs * sizeof(char*));
for (j =0 ; j <= numberOfMsgs; j++){
m[j] = malloc(141 * sizeof(char));
}
for(i=0;i<numberOfMsgs;i++){
if(i == numberOfMsgs - 1){
memcpy(m[i], message + (140*i), charsInLastMsg);
m[i][charsInLastMsg] = '\0';
}
else{
memcpy(m[i], message + (140*i), 140);
m[i][140] = '\0';
}
printf("m%d = %s\n", i, m[i]);
}
return m;
}
哪个我打电话是这样的:
char* message = "1, 2, 3, 4, 5, 6, 7, 8, 9 and 10, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100.";
int i=0;
char** m = split_string(message);
while(*m){
printf("string%d = %s\n", i, m[i]); //Problem at this line.
m++;
}
但是,当我运行它,我得到一个分段错误在上面指出的线上。如果我不打印,程序运行良好,所以我认为split_string()函数是正常的。
我在做什么错?我是一个新手,plz的帮助。
/************************************预计O/P ***** *****************************/
我想将字符串分成140个字符串,如下所示:
string0 = 1, 2, 3, 4, 5, 6, 7, 8, 9 and 10, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36
string1 = , 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71
string2 = , 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100.
你出去在数组边界的'M' ..分配'米[J] = malloc的(140 *的sizeof(char)的)',然后尝试'米[i] [140] ='\ 0';''m'从'0'到'139' – Haris 2014-10-28 11:11:26
问题不在printf中,它是split_string函数不起作用的结果。顺便说一句,你的预期产出是多少? – 2014-10-28 11:12:56
感谢您指出缓冲区溢出。我编辑了这个问题。请看一下。 顺便说一句,split_string()中的printf工作正常。 – Zaxter 2014-10-28 11:30:25