Everything is a metaphor. What a wonderful world.

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Posted on Edited on In Views: Valine:
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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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Posted on Edited on In Views: Valine:
Symbols count in article: 382 Reading time ≈ 1 mins.
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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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Posted on Edited on In Views: Valine:
Symbols count in article: 598 Reading time ≈ 1 mins.

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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Posted on Edited on In Views: Valine:
Symbols count in article: 385 Reading time ≈ 1 mins.

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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