Strlen pointer in C [closed]

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Hello I try to read a string from main and then parse it to a function and find its size but my code doesn't works can you help me?

 //main
         int size=10;
            char *string= (char*) malloc (sizeof(char)*15);

            scanf("%s",string);
            findAllReplacements(NULL,10,string);

//at findAllReplacements

void findAllReplacements(nameInfoT* names,int size,char* expression){
    int ssize=strlen(expression);
    printf("%stringsize:%d\n",ssize);

The program crashes at strlen. What am I doing wrong? I give as input "astring"

The size argument has nothing to do with the size of the string;

Answer 1

The program crashes at strlen.

Possibly because the string that you enter from stdin is larger than the size of the allocated memory.

Few more issues

printf("%stringsize:%d\n",ssize);

Aparently, %s is interpreted as if, you would be passing a string as a vararg. So per your format string, your printf excepts two arguments of type string and integer consecutively, , but instead ended up passing a singleton integer. You should have coded as

printf("%%stringsize:%d\n",ssize);

In C, casting the return value of malloc is superfluous.