将灰度转换为ascii并将其写入.txt文件
这是我的密码。lenaArray.h是一个灰度文件。我遇到的问题是，它不会写入文件，我也不会得到任何错误将灰度转换为ascii并将其写入.txt文件,c,ascii,C,Ascii,这是我的密码。lenaArray.h是一个灰度文件。我遇到的问题是，它不会写入文件，我也不会得到任何错误 include stdio.h include stdlib.h include stdint.h include "lenaArray.h" // Average grayscale big int avgGrayScale(int *lena){ int sum = 0; for (int x = 0; x < 512; x++){ for (i
include stdio.h
include stdlib.h
include stdint.h
include "lenaArray.h"
// Average grayscale big
int avgGrayScale(int *lena){
int sum = 0;
for (int x = 0; x < 512; x++){
for (int y = 0; y< 512 ; y++){
sum += lena[y * 512 + x];
}
}
return sum / (512 * 512);
}
// Average grayscale small
int avgGrayScaleSmall(int *lena){
int sum = 0;
for (int x = 100; x < 400; x++){
for (int y = 100; y< 400 ; y++){
sum += lena[y * 400 + x];
}
}
return sum / (300 * 300);
}
// Ascii character
char characterGrayScale(int grayScale) {
if (grayScale < 25) return '@';
if (grayScale < 50) return '%';
if (grayScale < 75) return '#';
if (grayScale < 100) return '*';
if (grayScale < 125) return '+';
if (grayScale < 150) return '=';
if (grayScale < 175) return '-';
if (grayScale < 200) return ':';
if (grayScale < 225) return '.';
return ' ';
}
int main (void) {
// print average grayscale big picture
int averageBigLena = avgGrayScale(&lena);
printf("Average grayscale big image: %d\n", averageBigLena);
// print average grayscale small picture
int averageSmallLena = avgGrayScaleSmall(&lena);
printf("Average grayscale small image: %d\n", averageSmallLena);
// Print lena in ascii to a file
FILE *lenaAsciiBig;
lenaAsciiBig = fopen("lena_ascii_big.txt", "w");
for (int x = 0; x < 512; x++) {
for (int y = 0; y < 512; y++) {
char c = characterGrayScale(lena[y * 512 + x]);
fwrite(&c, 1, 1, lenaAsciiBig);
}
char c = '\n';
fwrite(&c, 1, 1, lenaAsciiBig);
}
fclose(lenaAsciiBig);
return 0;
}
包括stdio.h
包括stdlib.h
包括stdint.h
包括“lenaArray.h”
//平均灰度大
int avgGrayScale（int*lena）{
整数和=0；
对于（int x=0；x<512；x++）{
对于（int y=0；y<512；y++）{
sum+=lena[y*512+x]；
}
}
返回和/（512*512）；
}
//平均灰度小
int avgGrayScaleSmall（int*lena）{
整数和=0；
对于（int x=100；x<400；x++）{
对于（int y=100；y<400；y++）{
总和+=lena[y*400+x]；
}
}
回报总额/（300*300）；
}
//Ascii字符
字符灰度（整数灰度）{
如果（灰度<25）返回“@”；
如果（灰度<50）返回“%”；
如果（灰度<75）返回“#”；
如果（灰度<100）返回“*”；
如果（灰度<125）返回“+”；
如果（灰度<150）返回“=”；
如果（灰度<175）返回“-”；
如果（灰度<200）返回“：”；
如果（灰度<225）返回“.”；
返回“”；
}
内部主（空）{
//打印平均灰度大图片
int averageBigLena=avgGrayScale（&lena）；
printf（“平均灰度大图像：%d\n”，averageBigLena）；
//打印平均灰度小图片
int averageSmallLena=avgGrayScaleSmall（&lena）；
printf（“平均灰度小图像：%d\n”，平均灰度小图像：%a）；
//将ascii格式的lena打印到文件中
文件*Lenaassibig；
Lenaassibig=fopen（“lena_ascii_big.txt”，“w”）；
对于（int x=0；x<512；x++）{
对于（int y=0；y<512；y++）{
字符c=字符灰度（lena[y*512+x]）；
fwrite（和c，1，1，Lenaassibig）；
}
字符c='\n'；
fwrite（和c，1，1，Lenaassibig）；
}
fclose（LenaasciBig）；
返回0；
}
#include“lenaArray.h”avgGrayScale（&lena）带有平均光线比例（lena）并对小版本进行了调整。最后，由于我的空lena数组，我收到一个256行256@的文本文件
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
//include "lenaArray.h"
int lena[512*512]; //Dirty HACK, becaus I dont have lena data
// Average grayscale big
int avgGrayScale(int *lena)
{
int sum = 0;
for (int x = 0; x < 512; x++)
{
for (int y = 0; y< 512 ; y++)
{
sum += lena[y * 512 + x];
}
}
return sum / (512 * 512);
}
// Average grayscale small
int avgGrayScaleSmall(int *lena)
{
int sum = 0;
for (int x = 100; x < 400; x++)
{
for (int y = 100; y< 400 ; y++)
{
sum += lena[y * 400 + x];
}
}
return sum / (300 * 300);
}
// Ascii character
char characterGrayScale(int grayScale)
{
if (grayScale < 25) return '@';
if (grayScale < 50) return '%';
if (grayScale < 75) return '#';
if (grayScale < 100) return '*';
if (grayScale < 125) return '+';
if (grayScale < 150) return '=';
if (grayScale < 175) return '-';
if (grayScale < 200) return ':';
if (grayScale < 225) return '.';
return ' ';
}
int main (void)
{
// print average grayscale big picture
int averageBigLena = avgGrayScale(lena);
printf("Average grayscale big image: %d\n", averageBigLena);
// print average grayscale small picture
int averageSmallLena = avgGrayScaleSmall(lena);
printf("Average grayscale small image: %d\n", averageSmallLena);
// Print lena in ascii to a file
FILE *lenaAsciiBig;
lenaAsciiBig = fopen("lena_ascii_big.txt", "w");
for (int x = 0; x < 512; x++)
{
for (int y = 0; y < 512; y++)
{
char c = characterGrayScale(lena[y * 512 + x]);
fwrite(&c, 1, 1, lenaAsciiBig);
}
char c = '\n';
fwrite(&c, 1, 1, lenaAsciiBig);
}
fclose(lenaAsciiBig);
return 0;
}
我对代码进行了两次修改。首先，我用简单空数组的定义替换了#include“lenaArray.h”
。然后我更改了调用avgGrayScale（&lena）带有平均光线比例（lena）并对小版本进行了调整。最后，由于我的空lena数组，我收到一个256行256@的文本文件
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
//include "lenaArray.h"
int lena[512*512]; //Dirty HACK, becaus I dont have lena data
// Average grayscale big
int avgGrayScale(int *lena)
{
int sum = 0;
for (int x = 0; x < 512; x++)
{
for (int y = 0; y< 512 ; y++)
{
sum += lena[y * 512 + x];
}
}
return sum / (512 * 512);
}
// Average grayscale small
int avgGrayScaleSmall(int *lena)
{
int sum = 0;
for (int x = 100; x < 400; x++)
{
for (int y = 100; y< 400 ; y++)
{
sum += lena[y * 400 + x];
}
}
return sum / (300 * 300);
}
// Ascii character
char characterGrayScale(int grayScale)
{
if (grayScale < 25) return '@';
if (grayScale < 50) return '%';
if (grayScale < 75) return '#';
if (grayScale < 100) return '*';
if (grayScale < 125) return '+';
if (grayScale < 150) return '=';
if (grayScale < 175) return '-';
if (grayScale < 200) return ':';
if (grayScale < 225) return '.';
return ' ';
}
int main (void)
{
// print average grayscale big picture
int averageBigLena = avgGrayScale(lena);
printf("Average grayscale big image: %d\n", averageBigLena);
// print average grayscale small picture
int averageSmallLena = avgGrayScaleSmall(lena);
printf("Average grayscale small image: %d\n", averageSmallLena);
// Print lena in ascii to a file
FILE *lenaAsciiBig;
lenaAsciiBig = fopen("lena_ascii_big.txt", "w");
for (int x = 0; x < 512; x++)
{
for (int y = 0; y < 512; y++)
{
char c = characterGrayScale(lena[y * 512 + x]);
fwrite(&c, 1, 1, lenaAsciiBig);
}
char c = '\n';
fwrite(&c, 1, 1, lenaAsciiBig);
}
fclose(lenaAsciiBig);
return 0;
}
编译发布的代码会导致：
gcc -ggdb -Wall -Wextra -Wconversion -pedantic -std=gnu11 -c "untitled.c" (in directory: /home/richard/Documents/forum)
untitled.c:1:1: error: unknown type name ‘include’
include stdio.h
^~~~~~~
untitled.c:1:14: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘.’ token
include stdio.h
^
untitled.c: In function ‘main’:
untitled.c:73:22: warning: implicit declaration of function ‘avgGrayScale’; did you mean ‘avgGrayScaleSmall’? [-Wimplicit-function-declaration]
int averageBigLena = avgGrayScale(&lena);
^~~~~~~~~~~~
avgGrayScaleSmall
untitled.c:73:36: error: ‘lena’ undeclared (first use in this function)
int averageBigLena = avgGrayScale(&lena);
^~~~
untitled.c:73:36: note: each undeclared identifier is reported only once for each function it appears in
untitled.c:75:3: warning: implicit declaration of function ‘printf’ [-Wimplicit-function-declaration]
printf("Average grayscale big image: %d\n", averageBigLena);
^~~~~~
untitled.c:75:3: warning: incompatible implicit declaration of built-in function ‘printf’
untitled.c:75:3: note: include ‘<stdio.h>’ or provide a declaration of ‘printf’
untitled.c:85:5: error: unknown type name ‘FILE’
FILE *lenaAsciiBig;
^~~~
untitled.c:87:20: warning: implicit declaration of function ‘fopen’ [-Wimplicit-function-declaration]
lenaAsciiBig = fopen("lena_ascii_big.txt", "w");
^~~~~
untitled.c:87:18: warning: assignment makes pointer from integer without a cast [-Wint-conversion]
lenaAsciiBig = fopen("lena_ascii_big.txt", "w");
^
untitled.c:95:13: warning: implicit declaration of function ‘fwrite’ [-Wimplicit-function-declaration]
fwrite(&c, 1, 1, lenaAsciiBig);
^~~~~~
untitled.c:95:13: warning: incompatible implicit declaration of built-in function ‘fwrite’
untitled.c:95:13: note: include ‘<stdio.h>’ or provide a declaration of ‘fwrite’
untitled.c:101:9: warning: incompatible implicit declaration of built-in function ‘fwrite’
fwrite(&c, 1, 1, lenaAsciiBig);
^~~~~~
untitled.c:101:9: note: include ‘<stdio.h>’ or provide a declaration of ‘fwrite’
untitled.c:105:5: warning: implicit declaration of function ‘fclose’ [-Wimplicit-function-declaration]
fclose(lenaAsciiBig);
^~~~~~
Compilation failed.
注意：为避免代码格式问题，在插入问题时，将每行代码缩进4个空格。编译发布的代码将导致：
gcc -ggdb -Wall -Wextra -Wconversion -pedantic -std=gnu11 -c "untitled.c" (in directory: /home/richard/Documents/forum)
untitled.c:1:1: error: unknown type name ‘include’
include stdio.h
^~~~~~~
untitled.c:1:14: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘.’ token
include stdio.h
^
untitled.c: In function ‘main’:
untitled.c:73:22: warning: implicit declaration of function ‘avgGrayScale’; did you mean ‘avgGrayScaleSmall’? [-Wimplicit-function-declaration]
int averageBigLena = avgGrayScale(&lena);
^~~~~~~~~~~~
avgGrayScaleSmall
untitled.c:73:36: error: ‘lena’ undeclared (first use in this function)
int averageBigLena = avgGrayScale(&lena);
^~~~
untitled.c:73:36: note: each undeclared identifier is reported only once for each function it appears in
untitled.c:75:3: warning: implicit declaration of function ‘printf’ [-Wimplicit-function-declaration]
printf("Average grayscale big image: %d\n", averageBigLena);
^~~~~~
untitled.c:75:3: warning: incompatible implicit declaration of built-in function ‘printf’
untitled.c:75:3: note: include ‘<stdio.h>’ or provide a declaration of ‘printf’
untitled.c:85:5: error: unknown type name ‘FILE’
FILE *lenaAsciiBig;
^~~~
untitled.c:87:20: warning: implicit declaration of function ‘fopen’ [-Wimplicit-function-declaration]
lenaAsciiBig = fopen("lena_ascii_big.txt", "w");
^~~~~
untitled.c:87:18: warning: assignment makes pointer from integer without a cast [-Wint-conversion]
lenaAsciiBig = fopen("lena_ascii_big.txt", "w");
^
untitled.c:95:13: warning: implicit declaration of function ‘fwrite’ [-Wimplicit-function-declaration]
fwrite(&c, 1, 1, lenaAsciiBig);
^~~~~~
untitled.c:95:13: warning: incompatible implicit declaration of built-in function ‘fwrite’
untitled.c:95:13: note: include ‘<stdio.h>’ or provide a declaration of ‘fwrite’
untitled.c:101:9: warning: incompatible implicit declaration of built-in function ‘fwrite’
fwrite(&c, 1, 1, lenaAsciiBig);
^~~~~~
untitled.c:101:9: note: include ‘<stdio.h>’ or provide a declaration of ‘fwrite’
untitled.c:105:5: warning: implicit declaration of function ‘fclose’ [-Wimplicit-function-declaration]
fclose(lenaAsciiBig);
^~~~~~
Compilation failed.
注意：为避免代码格式问题，在插入问题时，将每行代码缩进4个空格。如果程序没有出现任何错误，则可能是文件编写时搜索的位置错误；我们无法真正帮助您，除非您提供您阅读的.h
文件，以便我们能够重新还原如何添加文件？OT:为了便于阅读和理解：1）请始终缩进代码。在每个左大括号“{”之后缩进。在每个右大括号“}”之前取消缩进。建议每个缩进级别为4个空格。2） 不要随意加入一堆空行。相当独立的代码块：if
else
for
while
通过单个空行切换
案例
。3） 用2或3个空行分隔函数（保持一致）发布的代码不会编译！请更正此问题。如果程序未出现任何错误，则可能是文件已写入，但您在错误的位置进行了搜索；我们无法真正帮助您，除非您提供您阅读的.h
文件，以便我们能够重新还原如何添加文件？OT:为了便于阅读和理解：1）请始终缩进代码。在每个左大括号“{”之后缩进。在每个右大括号“}”之前取消缩进。建议每个缩进级别为4个空格。2） 不要随意加入一堆空行。相当独立的代码块：if
else
for
while
通过单个空行切换
案例
。3） 用2或3个空行分隔函数（保持一致）发布的代码不会编译！请更正此问题。文件中仍然没有打印任何内容。lena的类型是什么？程序是否在没有写访问权限的情况下将输出文件放到文件夹中？你看到屏幕上打印的平均值了吗？似乎有文件访问问题。可能fopen（）返回0。将lenaAsciiBig的值转储到屏幕上。文件中仍然没有打印任何内容lena
的类型是什么？程序是否在没有写访问权限的情况下将输出文件放到文件夹中？你看到屏幕上打印的平均值了吗？似乎有文件访问问题。可能fopen（）返回0。在屏幕上转储Lenaassibig的值。