Everything is a metaphor. What a wonderful world.

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C语言中数组大小不能为变量,即使这个变量已经被赋过值了,应该使用malloc方法进行数组空间动态分配。
如下:

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int *data=(int *)malloc(sizeof(int)*dataCount);
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#include <stdio.h>
#include <stdlib.h>

int main() {
FILE *inputFile;
inputFile = fopen("data.bin", "rb");
if (!inputFile) {
fprintf(stderr, "Can't open bin file!");
exit(1);
}

fseek(inputFile, 0, SEEK_END);
long inputFileLength = ftell(inputFile);
printf("input file length: %ld\n", inputFileLength);
fseek(inputFile, 0, SEEK_SET);

fclose(inputFile);
return 0;
}
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1. 使用strcat进行字符串拼接

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#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int main() {
char *firstName = "Theo";
char *lastName = "Tsao";
char *name = (char *) malloc(strlen(firstName) + strlen(lastName));
strcpy(name, firstName);
strcat(name, lastName);
printf("%s\n", name);
return 0;
}

2. 使用sprintf进行字符串拼接

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#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int main() {
char *firstName = "Theo";
char *lastName = "Tsao";
char *name = (char *) malloc(strlen(firstName) + strlen(lastName));
sprintf(name, "%s%s", firstName, lastName);
printf("%s\n", name);
return 0;
}
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1. 修改上一条提交的 commit message

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git commit --amend

2. 修改之前提交的 commit message

比如说,我想修改距此版本之前的第3条 commit message,运行

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git rebase -i HEAD~3
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